Do You Need Specific Motivation to Work on One Script Over Another?

In the beginning of a project, drafts are much longer. Out of ever note phase, i have a text file that's usually maybe five to ten thousand words long. That's like the starting point for what's eventually going to become a video. And just for comparison, i'm usually aiming for a thousand words in the final script. So I want to cut it down by a fifth or by a tenth, depending on how much i've started with.