I think at least one trip a year is for mental health.
I can see things so much more clearly if I’m over a hundred miles away from my normal daily routine – it’s almost like I’m outside looking in. I return to my routine with more enthusiasm, a clearer vision for where I’m going, and appreciation for just how good I have things.
It can be a trip to relative’s houses (couch surfing is cheap 🙂 ) as long as it is at least 100 miles – and several hundred miles is better – from home.