This is really tough for people with ADHD to adhere to. One of the ways that I've found to help me with the issue of constant distraction of opportunities is constantly checking the alignment of my goals with any new distraction that comes up.
I sell information for a living, so being constantly exposed to new information is a key function of my daily actions.
Saying no is what keeps me on track daily.
I'm glad to see people accepting that saying no to every opportunity is actually a positive thing. Thank you.