You never stop blundering. We're all human.
When does one stop blundering?

Even the best players lose. They might put together impressive win streaks or undefeated streaks, but all streaks end. The only way I can think of to stop blundering is to quit chess, but this won't keep you from making huge mistakes in other, more-important areas of your life.
Blundering. Everybody's doing it!

Do you remember that recent Carlsen Aronian game between the top 2 players in the world where both players missed the immediate win?

Playing Blitz and Bullet probably is not the easiest mode to avoid blundering.
I've started playing a team-corespondence game and we talk a long time about every move. I guess this one will most likely be relatively low on blunder.

I heard/read somewhere that GMs play almost as well on blitz as in long chess, because they play by memory, instinct and positional understanding rather than calculation.

Preventing blunders is all about looking further ahead in the game than your opponent and double checking all your moves. Those are usually the biggest issues. Most people will see an attack try to counter it, only to realize later they can't move their intended piece after the exchange because it leaves another piece vunerable or the aftermath of the exchange leaves open a patch on the left that has to be defended immediately yet impossible to reach in time without dropping pieces.

Paradox: You should make some blunders in order to stop making blunders.
So, you blunder in your 2nd game. Count how many games till you make the next blunder.
It's like this. WWWLWWWLWWWLWWWLWWWLWWWLWWWWWWWWWWWWWWWWWWWWWWL
W= you don't blunder.
L = you make some blunders.
So, try this. In a losing position, make more than 2 blunders intentionally. You will lose anyway.
But the good thing is you maybe don't blunder in a good position.
I've been playing for let's say 1 year, trying to improve a little (tactics, openings, endings, games analyzed, etc), lately I'm playing lightin 1 min, 2/1 or blitz 3 mins.
You don't see your pieces and pawns as a harmonious whole an army that fights together in sync in an organized way you start from the very beginning of the game with no plan and have absolutely no clue where your going and why (your just guessing move to move like most beginners do) your playing chess to lose that's why your blundering so much.
Because your forces are disorganized mess it's impossible to mount any credible attack or deal with your opponents plan or meet emergencies unanticipated actions by your opponent whenever they occur.
You need to work hard on your fundamentals if you want to play better and stop losing:
Game of Chess Sigebert Tarrasch
http://www.houseofstaunton.com/the-game-of-chess.html
Laskers Manual by Emmanuel Lasker
http://www.amazon.com/s/ref=nb_sb_noss_2/177-3651645-2835329?url=search-alias%3Daps&field-keywords=laskers%20manual
Another thing you can to improve is play slower games at least 35-50 minutes alot against good players don't rush or play your moves too quickly!

Terrible logic... Just terrible :P
If it were terrible, then you should have a better one.

Terrible logic... Just terrible :P
If it were terrible, then you should have a better one.
I guess it refers to your previous post.
Paradox: You should make some blunders in order to stop making blunders.
So, you blunder in your 2nd game. Count how many games till you make the next blunder.
It's like this. WWWLWWWLWWWLWWWLWWWLWWWLWWWWWWWWWWWWWWWWWWWWWWL
W= you don't blunder.
L = you make some blunders.
So, try this. In a losing position, make more than 2 blunders intentionally. You will lose anyway.
But the good thing is you maybe don't blunder in a good position.
If I understand well your argument, let me rephrase it.
-----
A certain percentage of blunders is bound to happen and cost the games, because we are human. Say an approximatively constant proportion of 'x' blunders per 1000 moves.
Then, to avoid those 'x' blunders to happen in games where you are winning, it is better to intentionally make blunders when you are losing, so as to decrease the number of blunders when winning.
-----
If this is indeed your logic, I can only recommend the reading of this : http://en.wikipedia.org/wiki/Gambler's_fallacy . The fact that you intentionally make blunders when losing will not decrease your unintentional blunder statistics.
On topic : never. But the frequency of blunders and their gravity decreases.

"Failure is the key to success, every mistake teaches us something." Morihei Uyeshiba. It is necessary to make mistakes in order for us to learn from experience and move on. Cheers, John C.

I've personally moved my blunders down from an average of 15% per game to, with the exceptions of really small games where a single blunder could be that 15%, under 10% and occassionally 0. However, if you play tactically, hold your position under stress and look for strong moves, most games should have few blunders.
Therefore, I was incredibly surprised when I had two games where, seperately, one was without mistakes but three blunders, and another I had zero inaccuracies and zero blunders, but made 44.3% of moves as mistakes (according to Chess.com's Computer Analysis). However, if you use Comp. Analysis you must remember that a computer will not always understand everything, even at our level. But 44.3%, even with that excuse, is inexcusable.
In short, expect to blunder, expect to make mistakes, but don't constantly think about them. Just play and your board, your moves will improve.

@Phylar : Computer analysis will flag 50% of my moves in K+Q vs K as blunders because they delay the mate. A more interesting percentage would be the percentage of blunders that you admit after seeing the line that are blunders.

@Phylar : Computer analysis will flag 50% of my moves in K+Q vs K as blunders because they delay the mate. A more interesting percentage would be the percentage of blunders that you admit after seeing the line that are blunders.
I understand this. I am saying that many moves cannot be openly commited to being proper blunders as they may not be bad enough to be considered as such. Thus I feel blunders are inappropriate to remove as that should be natural. Most important is improving the inaccuracies and mistakes.
I've been playing for let's say 1 year, trying to improve a little (tactics, openings, endings, games analyzed, etc), lately I'm playing lightin 1 min, 2/1 or blitz 3 mins.
However as far as I can see in every day I play I win some, I loose some against lower and higher rated players.
I have some decent games whean re I see no evident errors and also games where I blunder queen, miss oportunities and so on.
I've been 1356 in blitz and 1202 in bullet at some point, now I'm 1053 and 1018
I guess I get more angry about my lack of progress than I enjoy playing. So at this point I'm wondering if that is how it works.
Is there a level where you play all games correctly ? (either you loose or win)