In no particular order here's my five:
1. Solving the problems of the world over a few pints or drams (OK more than a few

) with my buddies.
2. Making Sunday dinner for "she who must be obeyed" and enjoying with her and a nice bottle of plonk.
3.Riding my bicycle, whether a club ride, non-comtetative event, a race or spinning indoors in the winter. It really clears my mind and leave me feeling great, even if I left everything on the pavement.
4. A gig or rehearsal that goes well. Playing in the stage band has always been fun.
5. A really good cup of coffee, especially a good dark roast or a well pulled espresso.