Burn in is result of uneven wear of individual pixels.
So biggest single thing would be avoiding static content.
Unfortunately that's badly incompatible with most PC use with even most games having at least some static elements like HUD...
Next would be controlling light level of environment.
Our vision is really measuring contrasts instead of absolute brightness.
So in less bright room you can keep monitor at lower brightness lowering stress and wear of pixels.
High temperatures would be also things to avoid with organic compounds being in general more fragile at elevated temperatures.
So try to avoid sun shining through window on OLED.
Inorganic quantum dots would have far higher endurance than organic stuff.
So let's hope electrolumiscent mode quantum dots appear in near future, because micro LEDs might be long way away.
(micro LEDs need separate semiconductor like manufacturing and then placing on panel, while quantum dot LEDs can be printed)
