Woo-hoo, free money! Are we allowed to add some money of our own if our total expenses are going to be more than $1,000? If so, I would like to go to Australia or Japan.
If we have to spend $1,000 and only $1,000, I’m thinking either a laptop or a week in Spain would be about right.
I would visit London.
If we’re talking about completely self indulgent, then you can’t really spend it as it would benefit the seller of whatever item you wished to purchase.
That pretty much narrows the options down to
a) wiping my ass with it
b) burning it
In which case I choose c) both (with the caveat that A comes before B).
Go back to Krabi, Thailand, and go diving for a week.
Hey, twickster!
For some people, a very thorough health checkup might very well be self-indulgent. 
Okay, Soup – but socks?!?!?!?