Here's one with rules. There are so many tips and ratings starring at you when you look at the screen I thought, "must be useful somehow.." I haven't followed it through with a number of races. But if anyone else wishes to do so, and let's us all know that would be much appreciated.
This is going to sound complicated to explain but it isn't.

1 Pick a race where there's three starts for each horse. (some form is good)
2 Pick a race where there's two tipsters up there choosing three horses.

3 Now it's adding up the points.
a) 3 points for the first pick, 2 points for the second pick 1 point for the third pick.

4 Now for the ratings on the side
a) 3 points for 100 or 99 rated. 2 points for 98 pointers and 1 point for 97 pointers.

5 Now for last two starts form.
Just add the last two starts and with that sum take it away from 10. eg a form at reads 235, would be 8, so 10-8 =2 points. If the sum is bigger than 10 then that horse gets 0 points. if there is an X for a spell, I use 6 to be the same as X. eg 4x2 = 8 so 10-8 =2

So you would add all these up.

6 You need to find a race field where you have at least THREE of these add up to 5 points or higher. But no more than Four. Two or less means it's very iffy.

7 with those that add up to 5 or higher, add these up as a sum. For this I'll use one of yesterday's races.

http://www.tabonline.com.au/2006/04/13/VR06.html That's Terang R6.

So the point system found these
Tab No 3 = 8 points
Tab No 2 = 2 points
Tab No 5 = 9 points
Tab No 1 = 12 points.

So there's 3,5,1 in contention in this race. Add these points makes a sum of 29.

I use this figure to help me get a 'value' estimate ( please tell me a better way if there is) based on the three finalists.

Horse 3 is paying $5.9 at the start of the race (can be $6 to make it easier) multiply this by 8 points = 48 return. That's BIGGER than 29 sum. That's good.

Horse 5 is $9 X 9 points = 81 return. That's good too.

Horse 1 is $3.4 X 12 points = about 40 return.

Take the two biggest and either dutch it or place even amounts of a level stake on each to win.

In this case No 5 won and paid $9.10.

Of course you need to make sure you are getting value, and also be very careful when there's a horse paying odds on or near that $2 mark to win in the field. I wouldn't do every race, just get ahead and stay there.

Well check it out! See what you think.