Draining ground beef is a real pain, but I have found a way that works for me. If the meat is really sitting in a large amount of grease I usually pour some off, but you don’t have to.
Place several paper towels on a plate. Set colander on top of paper towels. Line colander with a couple of paper towels to keep the meat from falling through the holes. Remove meat from pan or dish with a slotted spoon, and place in colander. When all of the meat is in the colander you can press on it to squeeze out more grease. Sometimes you can pull the paper towel out and squeeze more grease out of it.
Be very careful when separating the meat from the paper towel. It will be soggy and prone to tearing.
To use fewer paper towels, you can place the colander in a bowl.
I save my spaghetti sauce jars and lids. They make a perfect container for the grease. I do not reuse my beef grease.