Sometimes. For some of us.
A secret weapon? Set an alarm. If you don't have to keep checking a clock, your odds of "detaching" from Work Think are better AND there's less potential for other pesky distractions. If you don't have to look at a screen at all for 15 minutes, that screen has no hope of pulling you in a direction you've already told yourself you don't want to go.
It's just for 15 minutes. You've got this.