How can I convince myself not to keep looking at the market charts multiple times per day?
You need to take a break from bitcoin as a whole, including posting in here, reddit or any other place. I do that from time to time, get a month out and go get some sun, get some hobbies. It's good to take a break, specially when there's so much drama all the time in this community. Just be safe thinking that the Core devs continue making a good job and all the hardforking idiots are amateur players trying to compete against an NBA team with Kobe, Jordan and Durant all on the same team.
I think you just suggested the right remedy to cure this anxiety of checking charts. I feel the same way that long term investors should just forget about their investments for a while and chill out there so that they return after a long while to check what's going on from time to time and not everyday or several times within a day.