Are these sentences OK?
I thought what I was doing was right.
We all decided together that we were going to do this.
Look at yourself and talk! (someone criticizes the others all the time)

Question

Answer

The first two are fine.

"You can talk!" rising inflection works well as the third

Answer

all of us decided together

Answer

I thought that what I was doing, was right.

Answer

I thought what I was doing was right.
We all decided together that we were going to do this.

The above statements are correct.