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

Soccer | Argentina | Copa Argentina
2013-06-19 22:30:00	1	2	Prof. %
Atletico Rafaela - San Lorenzo	8.6	1.63	37.0283

FBYEM Yemeni League 13
2013-06-19 00:00:00	1	x	2	Pr %
Al-Yarmok-Ittihad Ibb	1.95	5.5	14	30.54

FBLTU A Lyga 13
2013-06-19 00:00:00	1	x	2	Pr %
Siauliai-Kruoja	5	4.8	2.75	29.54

Tennis | World | ATP Hertogenbosch
2013-06-19 14:45:00	1	2	Prof. %
Xavier Malisse - Yen-Hsun Lu	1.85	3.75	23.8839

FBECUP Club Friendlies 13
2013-06-19 00:00:00	1	x	2	Pr %
Senica-Dukla Trencin	4	3.6	3.35	21.02

FBBLR Premier League 13
2013-06-19 00:00:00	1	x	2	Pr %
Dnepr Mogilev-Torpedo BelAZ	3.05	3.4	4.75	20.12

FBFIN Kakkonen 13
2013-06-19 00:00:00	1	x	2	Pr %
Masku-FC Jazz	4.2	7	2.2	19.69

Soccer | Finland | Kakkonen Itainen
2013-06-19 16:30:00	1	X	2	Pr %
Atlantis FC - HIFK	3.2	4.75	3	16.7734

FBKAZ Cup 13
2013-06-19 00:00:00	1	x	2	Pr %
FC Taraz-FC Akzhayik	1.62	5.02	13	11.93

World Club Friendlies
2013-06-19 17:00:00	Over	Under	Prof. %
Mistelbach - Rapid Wien	1.60	3.71	11.79

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.