When it comes to high run goals, what's better?
For example, my high run is 36. If I set my goal at 50, that would be a realistic goal. If I set it for 100, that would be a stretch goal.
Does it make a difference?
There are short term goals and long term goals. I think that's a better way of putting it. You're goal of 100 balls is only unrealistic in the short term.
For any student in any vocation, you are looking at setting short term goals with the aim to achieve a long term goal.
If we look at the example of student in school, if I am looking to take a D student and improve them to an A or a B student, I'm not going to expect an A or B necessarily on their very next essay. I'll address issues and concerns one at a time and build them up to where they need to be. And it depends on the student, it could be research or study habits. Writing is generally an issue, but even there we need to break down their skills at writing and figure exactly where they are having trouble.
For you, I would want to see you place that 100 ball run as your long term goal and keep it in the back of your mind, but for now focus on 50 balls which is very achievable.
I think it is easier to adress whatever issues that are keeping you from running 50 balls than it is from running 100 balls. But keeping that long term goal in mind pushes you forward but should also keep you from saying "good enough" in particular area. For example, you don't want to say that your cue ball, patterns, stroke etc. are "good enough". There is always room for improvement for everyone, and that is what will get you to 100 balls. Finally the short term goals help chart progress and are less daunting when your goal is 50 then 75, 90 and eventually 100.