Comparing the odds gives you another interesting option - a sure bet called also an arbitrage bet. If you know exactly what this definition means and you need no additional information about sure bets you will probably would like to look at free sure bets list.
And briefly: playing sure bets is probably the only way to get a real chance to win against bookmakers.

View an example of Sure Bets!

Sure Bets Finder:   All - Today - Tomorrow - Next 3 Hours - Next 12 Hours - Top

Europe UEFA Euro
2014-09-09 18:45:00	1	X	2	Pr %
Norway - Italy	6.80	5.00	1.80	10.79

USA ATP Indian Wells Doubles
2014-03-12 01:30:00	Over	Under	Prof. %
Bob Bryan / Mike Bryan - Julien Benneteau / Edouard Roger-Vasselin	1.86	2.60	8.43

Europe UEFA Euro
2014-09-08 18:45:00	1X	2	Prof. %
Luxembourg - Belarus	2.34	2.00	7.83

USA WTA Indian Wells Doubles
2014-03-12 18:00:00	Over	Under	Prof. %
Su-Wei Hsieh / Shuai Peng - Ashleigh Barty / Casey Dellacqua	1.89	2.45	6.69

Europe UEFA Euro
2014-09-09 16:00:00	1X	2	Prof. %
Azerbaijan - Bulgaria	1.90	2.39	5.85

Europe UEFA Euro
2014-09-07 18:45:00	1	X	2	Pr %
Faroe Islands - Finland	15.50	7.05	1.35	5.59

Europe UEFA Euro
2014-09-09 18:45:00	1	X	2	Pr %
Andorra - Wales	36.00	10.00	1.22	5.55

Spain Liga Adelante
2014-03-16 16:00:00	1	2	Prof. %
CF Cordoba - CD Lugo	1.95	2.28	5.15

Europe UEFA Champions League
2014-03-18 19:45:00	1	2	Prof. %
Real Madrid - FC Schalke 04	1.99	2.20	4.49

Netherlands Dutch Eredivisie
2014-03-14 19:00:00	DNB1	DNB2	Prof. %
Cambuur Leeuwarden - RKC Waalwijk	1.29	5.50	4.49

The technique also known as sports arbitrage or Sure Bets is a great way to earn without losing sports betting, it all depends on your budget.

Logically, on a limited budget of 100 euros and a SureBets with 3% profit, the gain is relatively low, so you should be able to invest a greater sum of money to see increased investment faster.

We also have a list of the best bookmakers, that having more shares than others, where there are often Sure Bets.

So, having said that, needless to say good luck, since it is no longer to win a bet, but you will start to talk about a real job.