If you set artificial boundary to yourself, you fail.

I'll buy that.

Personally, I've just lived through a couple of years of hell. I'm now (hopefully) coming out the other end. Yes, it's OK to hang out and relax in front of the TV once in a while, but when evenings become a TV marathon because you can't tear yourself away from Repo Games or 1,000 Ways To Die, it's time to quit.

I realized the problem, cancelled my cable in September and got a ton of stuff done, including getting a new home file server set up (with RAID-1), something that I've had good intentions of doing .. for the last 18 months.

It's a matter of finding the right work/life balance. IMO I was spending too much time frittering, and not enough time being productive. That's now changed, but I need to stay on top of it. That may not be necessary for you, but it's what I need to do for myself.