My general approach to running is that I secretly hate it so I have to make it as easy as possible to do and as hard as possible to stop. The ideal route is a flat trail (with mile markings) that goes out half the distance I plan on running so I can turn around and run the other way back.
So my route always starts shortly outside of my house. The idea of driving somewhere, knowing I’d have to pee the moment I get there, not having a place to pee, and then mentally prepping myself for that run will just ruin the run itself. When I was at my running peak, my apartment building had access to a paved trail on the other side of the parking lot. I would run 2 miles out, turn around and come back.
When I ran 7 miles, I had a 3.5 path of sidewalks out so I could turn around and do that back. The more turns, stop lights, stop signs, and anything that makes me stop is a mental fight that would require me to rethink if I still want to run. The reason I like to run far away and then run back is that I know the fastest way home is to keep running.
I also like to know the route, know where my mile markers are, and know how i’m doing on time. My wife likes to randomly make turns in a neighborhood whenever we run. I hate it. I have to mentally know how much is left and how I’m progressing.
Right now I have a few 3-4 mile loops (that are similar to dog walking routes I take).
If I only want to do a mile, I can run on a track, but that’s way to easy to stop at any point I want. Otherwise it meets a lot of the critiera I look for (and the high school sports practice adds some extra entertainment value).
Rest is really the only thing you can do, which is partially how I stopped running (I also found biking more fun). If strength training is an answer, I am partially surprised as I would consider myself more of a weightlifter per se than a runner (I played American football in high school as an offensive and defensive lineman. Back then a 2 mile run was tough, but squatting 300 pounds was part of a warmup))
I never got too into running shoes and generally used whatever was cheap. This may have led to some injuries. Nowadays, I generally wear Nike running shoes as my normal sneakers (I walk my dogs several miles a day), so they are also my running shoes.
A work sponsored charity runs are how I got into running a lot more.