begginer out of ideas..

Hi, I hope i'm not posting this in the wrong forum..

i am not a very experienced chessplayer and i would like some tips.

I play a lot against the computer and it happens alot that I reach a point when I don't have any idea what to do. The following picture is an example:

 When I try to to advance any of my pieces i often end up losing material.

Could someone give me a tip on what to do next? Thx

What you want to do against the computer is mess up his king side pawn structure, (without any tactics). I think  in this case this can be done by moving Nh4 and next Nf5 to take control of the d6 square. (wich is a weak square). The computer will most likely play  g6 after it pulled away the bishop.. Now you've accomplished something. After you pull away the knight, you probably wanna place your bishop on h6. 

Also, some nice tips. 

The computer will almost always accept pawn gambits. example: If you offer a b pawn for a c pawn he will take it, giving you a better position. ( the computer is greedy)

Also when the computer doesn't know any good moves anymore, it starts to move the Queen pawns upon the board. This is usefull to know, when you want to mess up his Qside pawn structure. When you have a nice position, just move your king up and down or something. Avangetly he will move his Qside pawns. Goodluck

Buy a book on strategy!  Seriously,  Middle game strategy is one of the most difficult topics in chess.  You should try to understand where the opening is leading and that should help you formulate a plan.  The only other thing to say is you should try to remain as tactically aware as possible.  I didn't notice that you mentioned what side you were playing in the above, so if you want something more specific ( and i'm sure you do)  Try to find info on that particular opening.  Experience is, of course, the best teacher, so play on and on and on,  you will get more comfortable.

Man the computer sucks, its white to move in the diagram?

Anyways, in the diagrammed position, I suggest immediately playing Bg5 to neutralize the black knight.  If the computer plays Be2 or h6, whip it off with Bxf6.

"but recognition, a bishop pair is sexy"

Yes, but this is a closed position which favors knights.  More importantly, what I just suggested loosens the d5 outpost.  If there was anything I said that you didn't understand, go out and buy a book on chess strategy.

I agree with Bg5 here, and, if you are able next move, Nd5. In this case the computer will probably play this:

[White to Move] Bg5 h6. Bxf6 Qxf6. Nd5

This gives you an extra move to develop some more of your pieces, particularly your fianchettoed Knight and Bishop; or play c3 in anticipation of playing d4 to try and control the centre.

The computer might suck indeed, but it's a worthy oponent for me :P

And yes it's white to move.

Thx for all the tips! I'll keep them in mind. And I'll go get a chess strategy book as some of you suggested

Have Bg5 to neutralize the knight, and then once the knight breaks the pin or the computer forces you to take it, seize the center with Nd5. Control of the center is key as well as destroying his defending pieces.