Tom's Ulitmate Odds Line - The Software What I do is first look for overlays in the top 3 or 4. If I find a decent one, say my 7-2 line 3rd horse is 8-1, I'm really interested. If noting jumps out, I look at the lowest line horse and disparage it. Why can't it win, what's negative in its record, why can't it win? Often, the lowest line horse is just "terrible" on paper, all of its good numbers coming from a turf marathon on yielding grass a year ago in a stakes race and today it's in a 5.5F claimer on dirt. I may mentally add a half point for each major negative I find, say taking the horse from 9-5 to 3-1. Or just say "no thanks" and move on.
Since only the last line is used, I also double check to see if a potentially top rated horse got left out due to a bad last race that is really excusable.
If I have a 8-5 top horse, and the next horses are bunched, say 4-1, 9-2, 5-1....I might consider a part wheel over them, or, if the top horse is suspect, I might bet 2-3 others to win or W/P. The handicapping begins once the line is ready. Funny, it is much like the process Beyer outlined in his chapter "Putting it All Together" in his book Picking Winners," and just yesterday dnglfnk at PA talked about HE uses that very chapter in his process.