Chocolates? Alcohol? Beating up some unsuspecting stranger/not-stranger (literally or figuratively)?
Phhbbbttt ... so old school.
If you want to go for the most cutting edge measure, you gotta go the stem cell way.
How do you mend a broken heart? (Full version) from British Heart Foundation on Vimeo.
On the other hand, setting the property belonging to the person who broke your heart on fire may also help. However, make sure that you either have a good lawyer on your side or that you can't be caught.