It's been awhile since I poked around YouTube for self-treatment videos on 1st rib and neck problems. Here are some worth sharing:

1st Rib Self Joint Mob
https://www.youtube.com/watch?v=69pUWP4s90I
... This was an interesting approach because I hadn't seen it quite like this before. It uses only your hand so you can do it anywhere.

First Rib Mobilization
https://www.youtube.com/watch?v=RfrUXiNETTk
... another strap-based self adjustment. The standard PT recommendation.

Neck Exercises for self alignment
https://www.youtube.com/watch?v=BLXr0M6mdV8c
... haven't seen these exact ones before. Haven't tried them either. Who's going first?

Self SNAGs Self Treatment Cervical Spine pain & Stiffness Mulligan Concept Manual Therapy.wmv
https://www.youtube.com/watch?v=IyNntKOE0J4
... I have a lot of cervical crepitus and muscle spasms so this is interesting to me. He also shows how the fingers/hands can be used if you don't have a strap handy. Haven't tried it yet, but will.