I find when I'm struggling with life in general, I'm also struggling with the daily crap too. Realizing that I do need to actually feed my body, that exercise is good, and lots of chips are bad. It's a double edged sword. The worse I feel, the less I want to do, and that makes me feel even worse.
Some days I'm at least able to realize this, and then I can apply an idea I got from a friend. 5 minutes or 5 things. I can do something for 5 minutes or do 5 VERY small tasks. Often this is enough to get me moving and I can continue. Other days I'm gentle with myself and I just veg.
It's hard. You aren't alone. *hugs*