Already pointed here: avoid letting your nose pointing down (adjust your screen position, raise your smartphone while using it...). And avoid bad stress (=> re

Already pointed here: avoid letting your nose pointing down (adjust your screen position, raise your smartphone while using it...). And avoid bad stress (=> relax). Do not sit down for more than approx 1 hour (=> periodically walk for at least 3 minutes). Get a 'tui na' massage by a serious (probably Chinese) practitioner. Twice a week either hit the gym or swim (moderately train, whatever not dangerous discipline you like).