If you feel like screaming under water, and it is illegal to jump into the particular large body of it you are nearest - then try this. Take your iPod and play the right music for the moment (I choose Something for Kate but it's up to personal preference here). Then sit on the end of a wharf alone and watch the sun set over dinky sail boats on one of the world's most beautiful harbours. You can almost forget everything if you squint into the sun sparkling water and sink yourself into someone else's lyrical woes.
Alternativly. Keep your chin up and don't be a sook as my mother affectionatly reminded me. Sometime's mums are so right.