Things that never fail to put me in a good mood:
Solitude
Writing
Drawing
Reading (Mainly fiction, though I also enjoy reading about the human anatomy-especially the ear-and psychology. These are the topics I'm really interested in at the moment.)
Learning new things
The music of Franz Liszt
And the music of Chopin
And Tchaikovsky,
Oh, and Paganini!
Contemplating
And just being boring in general