Academics, reading, writing, basic herbology and teas and their uses, politics, world issues, psychology and how the mind works, love, camping and hiking and generally everything that is somehow related to relaxation :-P
The Shadow of the Wind - Carlos Ruiz Zafon, Diana Gabaldon's Cross Stitch Series, Hooked - G. Bruce Kneght, and thats all I can think of at present :-P