I don't know about you, but I'm incredibly bad at taking time off and actually taking a vacation, even for just a couple of days, can be hard. Instead I've mostly fallen into the fallacy of "being busy", which has somewhat hindered me from finding the time to switch off from my work.
Finding any kind of work-life balance is something that I've found to be quite tough to be honest. And most of the time, my mind has been my own worst enemy: I really struggle to switch it off and not think about work.
What's even harder is not to think about new ideas... I can totally go on a holiday, but I find inspiration so easily that my mind inevitably wanders to things that aren't related to the holiday at all. :)