Yes its one of those days, when no matter what there is to do, its impossible to get started on anything creative. So whats the solution??
For me, get some fresh air first. Although today is bitterly cold, not the best of options.
Get all the prep done, stretch paper, prime canvas, prelimary drawings, anything which cuts into creating time.
Review past sketch books, sort through photos.
Usually by the time I've looked through past sketch books normally fired up to get started again.
If that fails, then its admin, deal with paperwork etc all the normal stuff which gets done in 'free' time, paying bills etc..
So as the stretched paper has now dried best get on with some work.