I'm sure you've had it. A day where you don't feel like working
depending on your job you've had it more often then not.
Today (well now yesterday) was one of those days for me.
It may surprise some but you still get that feeling sometimes when you are working for your self and doing something you love. Now being self employed it's easy to just not work and do something else because you have no boss that will fire you for slacking off but being self employed if you don't work you don't eat so the drive to plow trough is much stronger.