Play a game with yourself. See how many fairways, and greens you can hit. Give yourself a point for each one. Also, give yourself a point for each up and down. 

You can also play three hole matches against your self. 

Kevin

Here's a tip you can try. I learned this from a friend. When your game starts slipping or you get nervous try singing a song! As silly as it sounds it actually works! It doesn't have to be any special song. Just pick a favorite!

What I do is have the other person keep score. By doing so, you can completely forget what they are at in comparison to yourself. Also, my favorite strategy in playing big money matches is to verbally "give up" on the match. This then subliminally forces your opponent to not play as sharp as they usually would.

I have the same problem, and would also like to hear some tips.

 I kind of have the opposite problem that you're describing.  I really enjoy the competition of playing with better players and I feel I play better when someone is pushing me.  Sometimes I sink down to my playing partners level, and that really gets me frustrated.  When that happens I try to set small goals for myself, like drive the ball over the hump in the left side of the fairway, or stick this shot on the top tier of the green.  

My advise would be to just focus on the target for your current or next shot.

Try really hard to avoid adding up your score until the end of the round.  Any time I focus on a number ( like if I just par the next three holes I'll beat my best score etc) I play terribly.  When I just add it up at the end I'm always pleasantly surprised.  

 If I just focus on hitting my current shot well, I play my best.

The key is playing one shot at a time.  Don't play the hole as a whole. Most times we get way ahead of ourselves.  Thoughts of "I need a par here", or "I'm two shots down", will ruin the game for sure.  Seperate the drive, second shot, chipping and putting individually.   Pick targets for each.  Slow the game down.  Visualize each ball flight  before giving it a rip.

Good Luck

Deno