Do regular casual exercise, concentrate on some fine work like reading a book, listening to soft music, have warm shower and a gentle body massage prior
to sleep. Continue Unisom, but better
to get a review from the attending physician.
Ambien is good choice for treatment of insomnia, but it is intended for short-term use. Elavil/Endep can be tried if you are not comfortable with Ambien and it is a non-addictive drug.