Hi there, congrats on your twins. As a fellow mother of twins I would first like to advise you to join Mothers of Multiples (
www.moms-hongkong.com) if you haven't already.
Many people have given you great advice, however, I know that those last weeks of pregnancy with twins can be very very hard. I made it all the way to 38 weeks and a few days and my babies were extremely large (larger than most of my friends' singletons) so you may not be able to do that much at the end in terms. However, that doesn't mean that you and your helper cannot sort things out as previous people have mentioned. However, no matter how young, try to go out for walk, small errands, with or without babies, even if it's only for 10-20-30 minutes, no matter how long it takes to get out of the house. Practice makes (almost) perfect, plus it gets you and the babies out of the house.
In terms of a schedule. I am a believer that schedules are very important, especially with twins, even if it's only to stay sane. Flexibility is all nice, but I had 3 under 3 to manage by myself without a helper and without my family (and my husband having a busy job). The sooner you have some kind of routine, the easier life will become as a mother of twins. You won't be able to meet all demands at the same time with 2 babies in the house, so starting early with some kind of schedule will help you and them. Two babies at night is exhausting, the sooner you/they know what to expect the better. That doesn't mean you shouldn't be flexible, that doesn't mean things won't change once you think you have them down, but they will get it, and it will make a big difference for you and your household. So by all means, start with any schedule /routine that you think works and work with it, adapt, etc.
I can recommend, Happy Sleep Habits, Happy Twins from Marc Weissbluth to get some pointers how to deal with sleep in terms of infant twins. Whether or not you agree with his ideas, it helps you understand how sleep works, gives some ideas and food for thought. Also MoMs will be a great resource in order to share experiences with other moms, so if you haven't joined already, please do. We've all been there! Because as a mom of a singleton and twins, I can tell you it's not the same, it's a whole different ball game ... but lots of fun!