i've learned na 1. Don't be friends with your ex - kasi based on my experience, there's no such thing, one of you will still hope na magkabalikan kayo kasi may isa sainyo na nagmamahal pa din sa isa. And parati ka lang masasaktan. So when you break up with someone, break everything pati connection.
2. History - you had your fun times with him, your moment kung baga, but that's history na. Wag ng ibalik, and if nalaman mong may mahal na siyang iba, kahit affected ka kahit onti learn to accept na hindi na siya sayo. The thing between the two of you is over.. So try not to be bitter kasi ikaw lang ang talo.
3. Distroying memories like pictures and donating his gifts helped me move on...wala ng remembrance...
Painful talaga after ng break up lalo na if ikaw yung sobrang nagmahal...kaya be strong and stand again.. Ask God for guidance..