Same way I treat my windows machine, but also the reason I wont be swapping it to linux any time soon. I use different operating systems for different purposes for a reason. It's great for fompartmentalization.

When I am in front of windows, I know I can permit myself to relax, breath easy and let off some steam. When I am not, I know I am there to learn/earn a living/produce something etc. Most probably do not need this, but my brain does, or I would never switch off.

What works for me is having different Activities/Workspaces in KDE - they have different wallpapers, pinned programs in the taskbar, the programs themselves launch only in a specific Activity. I hear others also use completely different user accounts.