Donate some of your money for people with hard lifes. Donate 35mm f/2 (old version) to me for xmas too!
With the rest of the money get a TS lens or prime.
I am donating blood. since many years...
I will never donate bigger amounts of money.
I was about to (half heartedly) post a "give your money to charity!" but I agree, donating something is a lot better than money. You can never be sure where the cash goes to, or what it's used for, or whether or not it ends up in the pockets of certain oppressive entities instead. Blood, food, clothes; those are better options.
With that said, "spend your money on location and subjects, not gear". Go on trips, visit great locations and meet interesting people, new places will spark your interest and give back memories~