keep (oneself) busy
To remain occupied (with something); to ensure that one is not idle or bored. I found that I had to keep myself busy while I was grieving. I just couldn't bear to sit still, or else I would start thinking about everything that happened. I bought a bunch of coloring books and board games so the kids can keep themselves busy during the break from school.
keep yourself ˈbusy
find enough things to do: Since she retired she’s kept herself very busy.