I failed to put a cap on conventions this year and went a little overboard and spent too much money. I did 5 cons, 4 of which required staying in hotels, and 1 that was out of town and I had to fly. Needless to say, it was an extremely expensive summer. Other than con expenses and costumes, I did not have money for anything else. I couldn't justify it when I also have rent, car, and groceries.
Next year, I think I'm going to limit it to 2 or 3, and try to find alternatives to hotels.