Always focus on the first 5 minutes that will lead to you doing the rest. If it's writing, just simply start the first paragraph and free flow till you get the momentum. If it's a morning walk, then it could be sleeping in your sports wear, have your toothbrush ready and the moment you're up, in under 5 minutes, you'll be out for the walk.
Once we get into the flow of things, the momentum will push us forward.
Cheers!