I tried many different things, too many to remember, including GTD type of things, "don't break the chain", and many others. I think what's working best for me

I tried many different things, too many to remember, including GTD type of things, "don't break the chain", and many others. I think what's working best for me (and what may work for you depends on your personality type and what you do) is setting (preferably) one goal for a day in the morning, writing it down, and then working to accomplish it.