This post is supposed to be about music though, not soft tinkle lights at bubbly sunsets. So music you shall have.
When I am having a bad day, I listen to this (Body in a Box- City and Colour):
http://www.youtube.com/watch?v=k8HPk26gdW0
Generally, anything by City and Colour does wonders for those fall-apart thoughts.
Warm summer days that make me want to go on a hike or sit and cuddle at a park, require this song (Bang Bang- Dispatch):
http://www.youtube.com/watch?v=zlKdXT9jM_A
Some days I feel simple. On those days I listen to this (Sentimental Heart- She&Him):
http://www.youtube.com/watch?v=T728aTfa5TU
Occasionally, I feel disoriented. This usually helps me find my bearings (Lake Michigan- Rogue Wave):
http://www.youtube.com/watch?v=4nOa1G-uB2A
Thinking makes me think of these kinds of songs (Ding Dong- Nellie Mckay):
http://www.youtube.com/watch?v=leqm00CmeT8
If you have some time, you should go through all of Nellie's songs and try to pick out the political or ethical issues she is singing about. Makes for an interesting night.
Other moods and other bands/artists:
Inspired- Pat Benatar
Calmed- Iron and Wine
Tricky- Coheed and Cambria
Functional- The Cranberries
Weird- The White Stripes
Retro- Styx
Modern- Regina Spektor
Slow- Josh Garrels
Cute- Bon Iver
Classic- Ben Harper
There are oh so many more I could list. I sure love me some tunes.