I believe, even as a personal trainer and fitness editor, that your life shouldn't be spent in the gym (unless you want it to be). For that reason, routines that can be done at home or that are short but effective can help contribute toward your weekly exercise routine without taking away from other things you love doing.
Recently, I was chatting with Pilates instructor Bojana, who runs the Strong Pilates studio. She gave me a three-move Pilates routine you can do using the reformer or your mat if you don't have access to a studio or machine.