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!