OK , I will weigh in here on the question, although I am no pro or not even close to that , I play straight for pure enjoyment , but 15 years ago when I was able to play a lot I had the opportunity to be able to often play a few very good straight pool players that lived near here. I got to understand the game from them. To answer the question my answer is 3 fold, #1) what enabled me to get from 20 ball runs to 40 ball runs was Bill Dunsmore used to tell me its all in cue ball control one ball at a time , stay focused on just that shot once down for the shot , although you have to have a plan mapped out , if you don't send them down one ball at a time with nothing else in your head but that ball and that position you will eventually dig a hole and have to take a tough shot. Then secondly, a guy named Dick McConnell I used to play with had a sporty game of straight , always running 80 on me, he told me "if you can run 20 then you can run 40" "if you can run 40 you can run 80", that also stuck in my head , he was right , if you know how to play the patterns and run 20 by getting into the next rack , then from there its execution and getting to 40 etc..because its the same patterns and execution, that helped me with that "mental block" , I would get to my usual 20 and just take a second to have a small chat with myself and reflect on what he said , then tell myself OK one ball at a time and lets get another 20 the same way. And lastly , what stuck in my head was something I read in a book , I think it was Miz's book , practice with the mental attitude like your in competition , when practicing always imagine your in a big tournament or when your in a run that you are down 80 to nothing in a 100 pointer, putting pressure on yourself mentaly to stay down on your shots and execute one shot at a time.
CreeDo, absolutely nothing to be embarrased about, keep it up and you will hit your goals.