Just take the time to remember what it is made you fall for the person in the first place, and make sure not to take the person for granted anymore... unless of course the reason(s) you broke up make that impossible. This has worked for me before. It also helps if they're a good lay.
My horoscope for today... Your best strategy for the day is to simply sit at home and do nothing. Why can no one appreciate this request? Why can no one else see that doing nothing is really doing something - relaxing. Don't let someone talk you into something you don't want to do.
Sounds good to me.