Dolly,

Forget the exotics midweek unless it's a metro meeting, the tri / quinella pools are useless.

There is still some great value there if you pick out the feature races for the day. E.G. Class 6 and Open handicaps. Often horses that are out of form at metro tracks can pinch a win at good odds against average opposition. You need to look at the horses performances over higher class races, not it's recent two or three starts.

Unless you go to the training tracks and barrier trials, I would stay away from maidens and lower class races, it's like finding a needle in a haystack. There is way too much hype and hence poor odds about maidens from top stables at country tracks.