It seems as though the second the lights turn out for bed every thought in my brain starts running. How can I calm my mind in order to fall asleep?

You can meditate before you fall asleep or do some exercise. You can also listen to your favorite music or any other relaxing music.

If you still have a lot of energy left over at the end of the day… sometimes I’ll get up and walk for a bit to wear some of it off. Then I’ll close my eyes and falling asleep is made easier

I can follow my breathing. Extend the exhale…and walk in my mind. I think that when we are body based…holding our hands in prayer mode, fingers laced…squeezing with the inhale, relaxing with the exhale…that is helpful.
Tapping my thighs helps too.