Can you learn aggression?

I can be a bit of a calling station at times. I raise draws and raise the hell outta my really strong hands, but with medium strength made hands I tend to call to much and fail to protect as well as I should. I want to get in the habit of either raising or folding a bet from my right. I played 2/4 (A lower limit for me)yesterday to try to increase my aggression factor regardless of the outcome at the end of the session. My plan was to not call any bet but either fold or raise. I did this for about 3 hands and then fell back into old ways.

Anyone try anything similar to this?

LLL