If I do anything that translates to active I also have trouble sleeping (except the summer when heat is my enemy for sleep).
Reading to me is very calming, magazines don't seem to bother me, but books are my "go to." Talking too much or on the phone is a serious no-no after 4:00 p.m. (or just before). TV shows, unless they're a good comedy, are fine...comedies are too much, I have to watch them very early in the evening. Thinking isn't good and I tend to write a lot at night, not for PR, but other things. Sleeping in the winter is much, much better, so I'm sorry to see the clocks go forward. Air conditioning isn't good when it's blowing directly on you. Nor is heat for that matter.
Walking in the evening can be a bit too much. I find earlier in the day best...although here the heat dictates when for me. I'm not walking now, still trying to regain strength. Most of all, I find our bodies will adjust....it takes time, like a month or two and yes, our sleep is disrupted until then. Yours, Lenora