Just don't feel like doing anything

As the title of this post says, just don't really feel like doing anything today. Work is really dragging today and to top it off I need to stay overnight. It wouldnt have been so bad if the Hotel I was booked into had a gym or a pool but it doesn't even have that so I won't be able to workout tonight, which is just adding more to the general feeling of meh! Days like this are rubbish as you can't work up the enthusiasm for what you are doing but you feel really bad about not achieving anything. Not a lot I can do, will do some reps when I get back to the Hotel room just as a statement of 'no matter how crap I feel I will still do something!'