Hm. If you already have a good savings plan (like automatically putting money into a 401k every week/month) and no debt and it's just some fun money I would say go on a little trip! If you have a decent car buy $100 worth of gas and go on a long weekend somewhere fun. Not sure where you can get to by car from your part of CA, but Oregon is really nice, or over to Vegas/the Grand Canyon... lots of choices.
Or buy a discount ticket to somewhere farther away and catch a concert in a cool city, or see your favorite non-local sport team. There's something pretty cool about flying into Chicago for a Sox game and then going home - it's not like you went to Chicago and caught a baseball game while you were there... you went to Chicago TO SEE A BALLGAME.
Hire a fishing or sailing charter for the day and take some friends. Go on a canoe or kayak trip.
Take up a new hobby and buy all the stuff you need for it. Register for a class in something complete useless but fun at a local college (photography, painting, cooking, etc).
Go out for a $500 meal with your significant other. There's some places that you could do that near you I'm sure.
There's lots of way to spend money other than gadgets!

But pay towards any debts first, and make sure you are saving, but otherwise enjoy!