my shortlist on a daily basis comprises of
1. Noting any SR over 10-1
2. Noting the pace for a race (if led is Green), and the top horse on pace is 10-1 or more I will shortlist it too
Then starts the work of looking at trainer/jockey snippets, if the horse has won off a higher mark before, record in class, etc etc
Pleasingly I backed Waseem Faris yesterday and Bosham. Its not scientific but whittles down the list of horses on a daily basis to look at.
Just a thought..