Anyone do any online gambling on sporting events? I'm sitting around with nothing on my agenda today and so I started thinking (..uh oh). This may be a hair-brained idea but here goes.. can one make a good living by betting only on the big favorites.. the ones almost certain to win? If that's ALL you bet on, unless you just have awful luck, you should consistently make money right? What kind of return can you usually generate on those big types of bets.. 20%.. 30.. 40%?