I have a shoulder injury so I stretch every day.
1. Levator scapulae stretch 3/side 2x/day; hold 20-30 sec
2. Upper trapezius "
3. Scalene "
4. T-spine self-mobilization (with a foam roller); hold 2-3 mins
5. Posture stretch on a foam roller (This one is my fave; just lie on a foam roller so your spine is flush and stretch out your arms at a 45-degree angle, palms up. Great stretch if your shoulders/neck are tight from stress/desk work.)
Right now I'm also doing Home, a daily yoga practice for January 2020 (Yoga with Adriene). https://www.youtube.com/playlist?list=PLui6Eyny-UzzFFfpiil94CUrWKVMaqmkm
It's SO GOOD.