I often put any project I write in a different decade just to roll the thought around in my head. There's a thriller I've written that I think would be nice to set in the '70s or '80s, just to take cell phones away from the movie. There's nothing like the piercing ring of an old-school telephone to really scare an audience.
I always kind of aim with the action stuff to make it feel like, as an audience member, you're experiencing what the people are experiencing. As soon as you go into slow-mo or repeated edits, shooting it like it's a stunt, it takes it out of that reality. The more real you make that stuff, the more tense it will be.