Bend The Pin

Face it, not everything in a house is perfectly level, and the most annoying out-of-whack thing is a door that won't stay put, swaying open or closed.  The simple solution is to remove one of the hinge pins, place it between a couple pieces of wood and give it a firm whack, bending the pin just a little bit.  That will give the hinge just the extra friction it needs to stay put.

Thanks to my brother-in-law Albert for this tip!

https://lifehacker.com/stop-a-door-from-swinging-open-by-bending-the-hinge-pin-1492180780