I don't know if anyone has put this on here already, but here is a little trick to help not make a big mess when pouring paint from a can.
A guy showed me Years ago a way to keep more paint in the can verses all over the place (table, hands, sides of the can).
When you open a new (or old) can of paint its pretty full. To keep things a little neater I just take the lid off and take a small punch (sharp nail or screw works too) to make a bunch of holes in the lowest part of the top of the can.
Then take some 2" masking tape and put around the top edge of the can. Next put another piece of tape onto the first one.
When you pour the paint out of the can you can see it doesn't run down the side of the can.
Then set the can back down to let the paint run through the holes you put in the top of the paint can. As you see no paint on the side of the can. When you put the lid back on the holes also help to keep paint from pushing out between the lid and the can.
Hope this helps you not make a mess. It sure has helped me.