Ive been struggling with this too, i haven't found anything fool proof but putting on music and sing a little bit and then i tell myself i have to sit up before the next song. Then I grab food and sometimes an energy drink to help clear the fog and then if i can stand it i do a guided beginner's yoga lesson on an app. I find that it helps me loosen my tense muscles and I feel a little bit more revived after. You can also do some poses in bed (i dont like to do this bc my bed is too soft for it and it makes it more difficult)