Got Minhagim? (got customs?)

Ones that you make up that apply to and are just followed by you, as far as you know?
I've got one. When I put change in my tzedakah (charity) box, I leave a few coins on top, in case someone comes over and wants to give tzedakah but doesn't have any extra money to give. Which reminds me, I have a bag of change in my trunk from the last time I emptied mine that I need to roll and donate (I know where I'm sending it).