I don't think the problem is that you can't focus - the problem is that the reward isn't high enough. I know your post isn't money-related, but let me digress. What is the point of fixing your procrastination? What goal are you really trying to achieve? If you can't pay attention in project meetings, so what? It's not like you'll get a $100,000 bonus for doing so. If there was a $10 million gold bar in the bottom of…
That is not how ADHD works. A person with untreated ADHD will not improve much even with incentives like this without treatment. The problem is that when it is untreated the executive part of the brain is not firing correctly because of a chemical imbalance. The meds help to fix that.
I was also actually diagnosed with bipolar - around the same time as the bad procrastination - but I stopped taking my meds a decade ago (against the wishes of my doctor) and I'm basically fine now.