The question is in the title really!
I'm self employed and work from home as a sound designer, I also create video content for online schools.
One of the major issues is that sometimes I will feel crappy and not work for a week or two, and then have to try and put a lot of work into a short space of time. The issue being.....I can't be bothered!
I know the obvious answer is 'just sort yourself out and get on with it', but it's incredibly hard some days.
What I do isn't complicated, but requires planning and a certain about of creativity. Some days I just don't feel like I have it in me, but I still need to get things done.
It does sound a bit like a first world problem, but it's a real problem for me.