And sleep is very important.
Remove all caffienated beverages from the house, don't allow her to drink caf. bev. away from home, particularly after noon, don't allow her to be on the computer or telephone late at night, get her some regular strenuous aerobic exercise, make sure she has room-darkening shades, etc.
Both of you will sleep much better.
We don’t do caffiene. Even in our tea, it’s decaf and that is limited. No, I learned the caffiene thing a LONG time ago.