Time management techniques can help to make the transition back to work less stressful.
In 2015 I went to a talk by Angela Cheruseo where she recommended having a plan for each day. List everything you want to get done, then give it a label:
A = must do today
B = should do today
C = good to do today, but not important
D = don't need to do today.
Then take the A list, and number these actions in the order of priority, and then do the same for the B list. Possibly don't even bother with the C and D lists - just accept that there will always be more things to do than can be done today. She says "single-minded completion of a task is the greatest time management technique. It will double your productivity, you will be more successful, and your work will be under control."
If there's something that's important to do, that you are resisting for some reason, prioritise it for the start of the day. If you leave it until later, you will have less energy to overcome your resistance.