So many questions these days.. here are some answers:
Where to Bet:
Buy your bets where the odds is the highest, not where the bookmakers shows you naked chicks on their site. Don't accept a 10% juice, but look for bookies with -105/-105 odds instead. There are loads of dodgy bookies out there so visit
http://www.sportsbookreview.com and check what they recommend for your style. There can be a large difference from betting $20 a game to $5000 a game (promos, lines, risk, limits)
Favourites and Dogs:
favourites and dogs are just in your and others heads.. the spreads aren't supposed to give a correct picture of the teams strength, but are made for making sure the bookies gets a fair amount on both sides.. they profit from the juice.. juice is the amount left when paying both sides of a bet.. normally 3-10% depending on the bookie..
Us Against The Bookies?
Nope, don't think of it that way. You are not betting against the bookmaker, but against other players. The bookmaker tries to balance his books and might even buy and sell bets himself to even out the risk. Bookmakers earn the juice. They don't like risk and will always try to have about equal amounts on each side (by moving the spread or odds), so they'll have a surewin.
How Much To Bet:
Make yourself a bankroll and make up some rules for your betting. If you don't, kiss that cash goodbuy. There will be streaks that can seriously hurt you. One safe way to do it is to bet 1-2% per bet and adjust that % only when the bankroll is up or down 25%. Don't wast your cash going all in on games. Chasing losses by loading up after losing days are the #1 of bankrupsy, stay away from that.
Negative Spread:
When you buy a negative spread, your team has to win by more than that spread.. aka -3 spread and your team has to win by 4 or more.. if they win by 3, thats a push and you'll get your money back..
Positive Spread:
When you buy a positiv spread, your team has to lose by less than the spread.. aka +3 spread and your team can win, or lose by 2..
Buying Points:
buying points is simply a way to up or down the spread.. problem is, the odds changes aswell.. so if you buy points, you will get lower odds.. for instance, if the spread is -3, you can get -2 if you accept lower odds in return.. you can also sell points and get higher odds. In the long run, buying points is worthless. You might have a 20% higher chance of winning with buying a point, but you'll also have 20% lower odds.