How to speed up my thought process?

In correspondence chess I am rated 1500 normally (my rating has dropped due to having too many games at once) but I have beaten much higher rated players but when I play faster time controls (blitz & bullet) I am rated around 900... how can I speed up my thought process to be able to play stronger under them times?

Don't know if you're familiar with Coach Dan Heisman, but he's written articles on just about everything.  Here's his take on speeding up your thought process:

http://www.chesscafe.com/text/heisman127.pdf

but kayknight you're much higher rated than me in blitz & bullet... baddog the pdf file dosen't seem to be working on here have you not got a URL for any websites where I can find it

Sure, I think they're all in PDF though:

http://danheisman.home.comcast.net/~danheisman/Articles/Novice_Nook_Links.htm

Wee!

Speeding up thought process comes from simplifying positions and "potential threats" as well as having a defined idea of how to attack using combinations and potential positional/tactical gains.

To obtain that you'll basically have to play alot in fast paced games like rapids and blitz, though i wouldn't recommend you to play bullet too much because that can really automatize your game way too much and you'll lose depth and pacience once you play correspondence again.

So, in summary, play, play really as many games as you can until you understand all the basic mechanics and patterns of threats and automatically you'll start to react much faster on some move you already know how to answer.

Keep it simple.

Games 5 minutes and less are mostly about beating the clock.

If you let yourself get wrapped-up in thinking too much, you will lose precious seconds.

Just stick with the basics; solid development, not hanging pieces and simple tactics.

Don't dwell too much on opponents' moves that seem unrelated to the position, because they probably are unrelated to the position and only meant to make you slow down think.

Last week someone posted a game where they were losing. They made a random move catching their opponent off guard. This allowed the opponents clock to run down and he lost the game. - The losing player won on time!

Stay focused on simple tactics and plans. If your opponent starts making strange moves to try and throw you off, your focus will allow you to adapt and take advantage of their weak play.

Continue playing Online Chess games. What you learn there will find its way into your fast games.