I work from home, and I've toyed with the idea of dressing up (even just a collared shirt) for exactly this reason - putting on formal attire helps me get into

I work from home, and I've toyed with the idea of dressing up (even just a collared shirt) for exactly this reason - putting on formal attire helps me get into the proper mental state for work. I've used the same trick (suiting up every day) to keep myself productive in absolutely miserable working conditions. Sure, it'd be nice if I had the self-discipline necessary to keep myself focused, etc. regardless of what I wore---but sometimes I don't, so thankfully formal wear is another tool I can apply in those situations where I need it.