Is there anything I can do about really cold hands and feet?

Activity. The best things are the simple things- gloves, socks, activity (walking). I you are concerned about your circulation then a vascular ultrasound will help answer your questions.
Yes. There are many causes for cold hands and feet. If your circulation itself is normal, this may be a vasospasm problem. In this case, avoiding smoking, caffeine, cold temperatures, and stress may help alleviate the problem. If this is not enough, there are medications that can be helpful as well.