Time Management

I'm starting to go into "panic" mode now that #3 is almost here. I barely have time for my 2 kids AND my work AND the housework AND appointments. I'm not sure how I'll have time or a 3rd baby, especially an infant that actually needs me to do things for him. On top of that, my oldest will be starting preschool in the fall which requires me to drop her off and pick her up. I'm wondering how I'll possibly have time to do everything in a single day. As it is, I often find myself working until 11 at night and I still haven't gotten everything done.

Quite simply, I feel over extended and I don't have time to do anything that I want to do.

It's a terrible place to be. I know it's just poor time management on my part, but I'm starting to feel like I really need to get things in shape so I'm not scrambling. Any tips from super organized moms on how to make things go smoother? I know I can't make all the changes I need to make all at once, so I'm thinking of setting little goals for myself, which will probably get shot to hell when I go into the hospital and come back with a baby. Here's a few things I'd like to change off the top of my head:

-Spend less time on the computer (includes work, Facebook, etc.)
-Clean the kitchen before bed each night
-Clean the dining room table before bed each night
-Get back into my cleaning routine
-Get work done faster
-Spend time outside with the kids every day once it gets warmer