LPT: When paying for parking, if possible, pay for an extra hour. You won't rush when you're out, and then if you come back early you can be kind to someone else by offering them your ticket. Instant feel good.

EDIT: As stated in the comments, some places are against this act of kindness and can result in a fine so...probably avoid this LPT that I thought was a LPT!

EDIT EDIT: Maybe just focus on the pay for an extra hour so you don't stress. This LPT has been a huge fail on my part.