Treating Covid mitigation as a temporary measure that would be lifted in just a few weeks, while having to renew those measures every few weeks until the Rise of Omicron led directly to surrendering to Forever Covid, is how governments prevented people from forming and establishing habits and routines around Covid/virus prevention.
You can, though, work to establish the routine of putting on a respirator whenever you put on all the rest of your leaving the house gear.
https://lifehacker.com/how-long-it-really-takes-to-form-habits