What are your suggestions for handling repeated negative self talk
The first thing is to acknowledge the thought, and congratulate yourself for becoming aware of the issue. If you were not aware of the issue then you couldn't do anything about it. I actually twist that famous philosopher Aristotles' words a little to be - when you recognise a challenge (negative self talk), then you're half way through the challenge. The next step is to decide whether you're going to do something about it or not. If you choose yes, then you're 75% of the way through the challenge. The last bit is doing it. And the techniques that I espouse will teach you how to "do it".
What you need to do is to let the thought go. My wife Sandra, just lets out a big breath, blowing the thought away from her. In my seminars, I suggest letting the thought out through the top of your head and then watch it going up and away from you - or onto an escalator that is going away from you.
Or, replace the negative thought by saying your new habit (or goal) immediately.