Close the cabinets.
This rule refers to a charming trait I get from my family. We leave cabinets ajar. So whenever I go get something I make an effort to close the cabinet, but I am often on my way to the next thing without checking to see if the cabinet has made it all the way closed.
My wife hates this. She is always concerned that she is going to bang her head or her foot on an open cabinet. Plus she says it makes us look like hicks to have a bunch of half open cabinets. So please when you are done, close the cabinets.