Hard getting back into the routine

I'm having a hard time getting back into my old routine. Going back to school is a real killer physically. I feel as if I want to take a nap every few hours and of course I can't do that. I'm sure that I'll get the hang of it sooner or later. I'm also having a problem getting back into writing. I stopped in New York and on the Queen Mary, other than sketching out some ideas. Emma and I worked on our joint novel and got the basic plot line down along with the major characters. However, my novel (6 chapters already written) didn't progress at all. In part the problem is a dearth of ideas for the second half. I know how it ends but not how I get there. Whenever I stop writing for a while, the same thing happens. I dry up. the more I write the more ideas I have and the more I can write so obviously I just have to start writing again, no matter what it is. I'll try to get back to 1000 words a day. When I write at that level I seem to be at most productive and creative. Now to find the time when I'm not tired!