Instead of flexibility, i decided to work on my soft tissue by rolling around on a tennis ball.
If you have carpeting you're good. On hardwood, throw down a towel or something. Also, when doing the chest or upper back, it's easier just to stand. Put the ball between you and the wall and go to work. It looks ridiculous so if people are around, make sure their phones aren't nearby ready to film you.
I did this for nearly 25 minutes. Worked on my upper back, shoulders, chest, and hips.
