Is There Anything I Can Do to Improve My Memory?

My short-term memory is where it needs to be, but I'm kind of embarrassed because I can't remember (for example) how to do chemistry I learned in class less than a year ago.

Is there anything at all I can do to get better?

Suggestion:

I have read that scientifically designed game can improve memory as well as attention :

http://health-4all.blogspot.com/2010/07/reclaim-your-brain.html

I have tried them my self and they are fun as well and they make you think more and memorize more .