The fact is that most of us can find an hour or two a week to practice if we really want to improve. We just have to live by a pre-set schedule to follow week in and week out and want it bad enough. But, if you’re really one of those rare cases that can’t find an hour or two a week, I would recommend at least swinging the club in your backyard (even using golf wiffle balls) or swinging in front of a large mirror at home just to (at least) check that you’re in the right positions. You can also always practice putting without leaving home. That’s another way to improve and find strokes. Just buy one of those putting mats that come with a hole and work on grooving your short putts.