I work on a couple of different "flags" when I'm looking at plays, that I have prioritised (i.e. one game might actually trigger more than one "flag;" the one that has the most consistent profit takes priority.)
The primary things for which I am looking when I look at the lines for the day are:
Dogs +150 or higher
Money Standings -- Texas, Cincinatti at home, St. Louis as a road dog)
Favourites with a +money RL
From there I cull it down, sometimes just laying off for a day and sometimes loading up (biggest day so far was twelve plays, which went 8-4 thank God.)
When looking at statistics and histories, I tend to focus more on the right now than the past, since baseball can be so streaky.
Once I have a "framework" of plays I try to distribute money in such a manner that I am likely to make money if I split or go one under even (obviously this does not apply today, when I have just one play up.) Good money management has saved my ass on several days so far this season, allowing me a modest 0.25-1.00 unit profit on days that would have otherwise been losers had I bet flat 1 unit bets.
This is working out pretty well for me so far this season, so I'm sticking to it and trying to keep the tweaking to a minimum.
Phaedrus