A great example has been my day today:

Woke up feeling extremely tired, thought I would probably spend all day in bed.
Got on the computer and started messing around, made breakfast, watched some TV.
Thought I would probably get together with a friend later, which made me feel good.
Decided to go to Target on an impulse to buy a skirt.
Got home from Target feeling anxious, like I shouldn't have spend money.
Wanted to go lay in bed again but didn't.
Decided not to meet one friend but to meet up with another one, in a less stressful place (noisy bar vs. someone's house).
It just goes on and on.