first, i would recommend you keep all your bets the same size.........
give it some time, and the re-evaluate yourself after a season or two....
while chuck is right, IN THEORY, that stronger plays should merit a larger betting unit...
it is VERY, VERY EASY to screw this technique up BIG TIME....
so many people THINK that their, let's call them 65% plays (just to make things simple) are worthy of 3 betting units and their 55% plays are worthy of 1 betting unit...
okay, sounds simple....BUT....unless you have AT LEAST a couple hundred, preferably, a couple THOUSAND plays under your belt, you are NOT going know for sure if they really are "65%" and "55%" plays, respectively...
this is where most people go wrong....they THINK their plays are stronger but they don't have anywhere near enough historical evidence to prove this to be true...
the margins of error on even 1,000 plays are +/- 3%....just think about what they are at only 200 or 300 plays! don't risk it!
just keep your betting units the same until you are absolutely, positively sure that you have a certain expected win pct. on a certain type of play...
then you can confidently risk a little more on your stronger plays.
it may cost you some money in the short-term (since you might end up winning less money off your "strong" plays than you would have if you bet more on those)....
but it will more than likely save you money since you may very well not have the higher win probability that you think you have...
besides, isn't it better to play it safe at the beginning??? most gamblers learn the hard way, by NOT playing it safe....
hope this helps!