there is no such thing as 'don't think about it' or 'try not to think about it', coz the more you try to tell yourself to forget, the more you will remember. instead, try to occupy yourself with work, leisure, friends, family, tour, etc to refocus your life.

seriously, you will only successfully forget something when someone just 'reminded' you. if you can remind it yourself, you still haven't really get over and forget...