Receiving good feedback on anything I've submitted. While there is nothing to beat the good feeling you get when your story is accepted, good feedback is the next best thing. Use it wisely and it'll help get your work published the next time you sent it out. (And if more than one person tells you roughly the same thing you ignore that advice at your own peril).
Thinking of songs that suit my characters. I've ended up with quite a play list. Much as I love Desert Island Discs I know I'd have a hard job getting my selection down to a mere 8l
Finishing my writing session for the evening and having thorougly enjoyed myself and feeiling I've got lots done.