How do you choose your daily dose of music?

Sometimes I get music stuck in my head and just have to listen to it.  Other times during my daily meanderings I hear something (not necessarily music) that make me think of an album or song I want to hear.  Just a curious question.
Do you thumb through your library and choose or does one thing lead to another (this is typically my case)?
I certainly can find myself lost as in down the rabbit hole and it may last for hours. Do you find yourself going after music that is recommended here or other places, or by other people etc.  
Regards,
barts