1. Keep your health in a tip-top condition.
In general, just do your very best to avoid major injuries, sickness. Be careful when you go out or even in the house (Ceilings do fall, y'know?). You never want to delay your 1st day just because you have a flu/sprained ankle that day. Well, exercising is a good suggestion too. It never harms to keep yourself in shape. Or, to some others, try to regain their ideal weight. (Yup, including yours truly.)
2. Give your mind some good workout.
Keep yourself updated with the latest happenings. Watch prime time news. Read newspapers. Yes, the headlines. Or, you can pick up books that you've been dying to finish since last years. Buy that highly recommended novel. Or, read academic journals to equip yourself with more knowledge. Anything that you find suitable to you.
3. Spend quality time with family, friends, etc...
You'll never know where your "next destination" is. Therefore, it is a good idea to use the abundant time you have with people you care. Besides, who's gonna lend you an umbrella for the next three months of drought, if not your own blood? Catching up with old friends is good too. The point is, make the spent time worth the while.
In conclusion, savour each moment! Sleeping in is a huge blessing. Having meals with your family and friends. Watching TV all the time until your parents told you off. Going out with friends on any day, because to you, everyday is still an off day. All these perks, you might enjoy them again after a very long time. Be patient. Believe that He has all planned out for you. When the time comes, a good soldier you know you are, you are all prepared to step on the New World!
Good luck, everyone!