Eliminate the distractions. I have a separate desk for work. I sometimes turn off the network on the machine on that desk when reading/brainstorming/focussing

Eliminate the distractions. I have a separate desk for work. I sometimes turn off the network on the machine on that desk when reading/brainstorming/focussing. My phone isn't in the room. Get into the habit of mentally segregating your workspace like that. I use the separate desk just to re-enforce the line for myself. It's obviously not strictly necessary. But when I do this, I find that distractions feel out of place and I notice them more quickly. (Why am I sitting here with my phone? I never have my phone in this room. I shouldn't have my phone in this room.)