Not sure if I can recommend this suggestion, because for me exactly the opposite worked out fine.
I never used fitness crap lying around my home regularly but once I started paying for a gym membership there was no way I would just stay at home and pay for nothing.
In other words I used the sunken cost fallacy for my benefit.
Once I was more advanced it wasn't the money I spent on my membership that kept me going but knowing that I'll actually get weaker if I started to only go 2 times a week instead of keeping up my 3 times a week routine. So every time I didn't visit my full 3 days a week it felt like I essentially wasted a few of my last trips to the gym because I wouldn't see any progress and at the very best just keep my performance at a plateau.
I trained quite hard for 1,5 years and missed maybe 4 training sessions, until a knee injury from squatting with too much weight coupled with moving to a new location put a stop to my training days.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.