Stuff I've done after breakups:
Partied with my friends and copious amounts of ice cream and/or alcohol
Rearranged the furniture in my room
Gone for long runs alone (bad idea if you're in Boston in February... brrr)
Cut him out of my pictures (not literally - I used Photoshop
)
Thrown myself into my studies and other activities - kept busy
... and, in the due course of time, moved on.