Start with a short amount of time.

Breaking the habit and forming a new one where you allow your brain time to rest and recharge is important. Because it's hard to do, you should start with a short time. 

Maybe just 15 minutes. There are some tasks you can do in 15 minutes that provide stimulation while being restful, like brewing a pot of tea or coffee, wiping down your kitchen benches, a short moving meditation, or interacting with a pet.