First of all, this is not a "rich in 10 days"-post.
This is not a 100% guaranteed method to win. No one can predict 100% the outcome of 5-8 games without messing one up.
This is not ment for people under 18 years.
This is just for fun, try it for as much as you can afford to lose, don't think you're going to make 100's of K$ with sportbets, don't get addicted to it.
We need a betting site, i'm not going to provide one. Most people know some betting sites and i wont provide it here because here are probably guys under 18 years.
If you are lucky the site provides starter bonuses. If you register a new account you'll mostly get a decent bonus on first deposit. Of course you can't just deposit 1'000$, get 50-100% deposit bonus and then just cash out 1'500-2000$. It's going to be locked and is just usable for betting, lets say we need to wash the money.
Choose popular playing dates or events. Bet on events like Champions League, World Championship or European Championship. Or watch out for popular leagues like Spanish La Liga, English Premier League, Turkish Süper Lig or Italian Seria A. You can check out fixtures through gooogle seach.
It's easier to predict how a well-known club isgoing to play than a noname-club (English Premier League example Leicester City 2014/15/16.).Study the teams, you don't have to read the history since they have been founded. Check out the recent matches, check out the ball-possesion and in what line-ups the team played the latest matches. Check out if important players of that team are playing, or if some of them are injured or if some of them have gotten a red card.
Don't do a lot tie bets. They are most unlikely, that's why they have almost everytime a quote of 2.5+. Only if you are willing to risk, bet on noname-clubs who play against each other on tie, they are going most likely to try to defend their goals, so they don't loose. They will be more careful to charge to the other goal. Rather bet on the outcome, choose a team who's more likely to win. Or when a good club plays, bet on how many goals are going to be made in the match, example: 0,5+, at least 1 goal must be scored by any team in the game, 1,5+, at least 2 goals, if during the game only 1 goal is scored your going to loose.
Don't be greedy. I know watching the quotes multiplying by itselfs looks amazing, the possible profit grows with each dollar you willing to bet, but it's not worth it to risk to predict the right outcome of 15 games. Better bet on 5-8 games, make a decent bet-amount you can afford to lose, and you will possibly can afford something neat for you.
If you won, even then, don't be stupid and greedy, cash out, at least 90%. If you won a decent amount of money, like 1'000$, then the 10% your leaving on the account is nice for some more betting if you want to continue and risk, but you have 900$ more in your pocket which you are free to spend however you want.
Again, this is not a get easy rich in few clicks guide.
Don't blame me if you loose a lot of money, I told you if you want to bet, just bet as much as you can afford.
Don't get addicted to it and play only if you reached the legal age in your country for gambling. Not just to get the bad habits of gambling, most sites wont let you cashout if you don't verify yourself by license, driver license or passport.
Have fun and best wishes.