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I found that (for me) the key to making a habit out of some things is to eliminate as much friction as possible in just getting started. If I were you, I'd look at the simplest things like "7 minute workout" to just get started with something easy enough to fit into my routine and once it becomes a habit, one could consider making it more intense. There are interesting challenges like the "100 pushups" or "200 squats" challenge for which you only need a bit of free space on the floor.