$2000 is a lot of money in what is basically 3 months. That's close to 700/month. I'm not sure cooking for yourself and doing your own nails will get you there. If you had more time, sure, but not in such a short amount of time.
I'd start by looking at big-ticket cost-cutting items like car insurance - shop around to see if there is any place you can get the same coverage you have cheaper, if you haven't done so in awhile.
Also, do you typically get a large tax refund? If so, adjust your withholding allowances now to get that money immediately instead of letting the government keep it until next year.
Pizza delivery is one of the classic part-time jobs to raise money. You could also sign up with Uber or Lyft. (Not that I personally would do any of these for safety reasons, but if you really want to raise the money part-time and still have the freedom to take time off when you want, then these are the type of jobs that you may have to look at.)
What's your Christmas budget? If that is high, is there any way to cut back significantly there?