Physical activity that makes you feel tired and/or relaxes your mind is very good before going to bed as your thoughts will not wander and you will doze off wit

Physical activity that makes you feel tired and/or relaxes your mind is very good before going to bed as your thoughts will not wander and you will doze off within minutes. I used to have this problem of going to sleep after switching off lights and going to bed. I started doing simple exercises like cleaning/arranging my room or relaxation yoga which would take my mind off thinking a lot before falling asleep. Also I started reading books (not e-books, which make you insomniac) for 15-20 minutes everyday before going to sleep. You can exercise just before going to bed. For a free stopwatch you can use your smartphone or alarm clock.