What to buy to improve daily life

Consistency is the greatest tool in the world. Just waking up and getting out of bed at the same time every day can be miraculous for your body and mind.
There's a phrase therapists use a lot of, "Never make plans to go to the gym. Make plans to put on your gym clothes". If you're wanting to alter your habits, find a thing you can enjoy elements of, and start working towards that. If you're wanting to exercise, build a playlist and get a good pair of headphones, etc