I know how you feel! I fight the very same thing. Two things that work for me... sometimes.
1. "Get up and do SOMETHING... even if it's wrong!" I heard that somewhere. Getting up and moving, doing anything will start you going. A walk is good! Doing something you like is also good.
2. When I start getting uptight because something needs to be done and "I don't feel like it", I may sit and stew about it but sooner or later, I get fed up with all the energy building up that will turn to anxiety and I put it on "automatic pilot". I don't think about that particular thing anymore, I just slowly start doing what has to be done. Maybe the TV will be on, or the radio... or I'll think about something pleasant. If there's nothing pleasant to think about, then I make it up.

LOL Concentrating on that rather than what I'm doing will get me through the chore and it's done before I know it.
So why am I sitting here trying to dredge up something that catches my interest instead of taking my dog for a walk and starting the two things I've "planned out" for myself? You got it! Inertia! LOL
Ok, Amber! I'm coming! I'm coming! Let's go for your walk. SHEEEEEESH!
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.