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.

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

Serie A - First Stage
2017-06-25 22:00:00	1	X	2	Pr %
Barcelona SC - Delfin	2.24	4.19	7.63	18.38

Superettan
2017-06-26 17:00:00	1	X	2	Pr %
Varnamo - Helsingborg	3.15	3.75	3.22	10.53

Serie A - First Stage
2017-06-25 16:30:00	1	X	2	Pr %
LDU Quito - Emelec	3.95	3.40	2.71	8.37

Capital One Cup
2017-08-08 18:45:00	1	X	2	Pr %
Bristol Rovers - Cambridge Utd	2.15	3.74	5.40	8.23

Division 2 - Group 1
2017-06-25 16:00:00	1	X	2	Pr %
Grorud - Valerenga 2	1.70	5.30	6.95	7.92

Super League
2017-06-25 11:35:00	1	X	2	Pr %
Shanghai SIPG - Henan Jianye	1.44	7.50	9.50	6.70

Club Friendly
2017-06-25 13:00:00	1	X	2	Pr %
Wolfsburg II - Berliner AK 07	1.91	4.45	4.99	5.13

Pepsideild
2017-06-26 20:00:00	1	X	2	Pr %
Breidablik - Grindavik	2.25	3.75	4.20	5.08

Primera Division
2017-06-25 18:00:00	1	X	2	Pr %
Wanderers - River Plate	2.38	3.54	3.95	4.42

Liga De Futbol Prof
2017-06-25 19:00:00	1	X	2	Pr %
U. Sucre - Bolivar	5.00	4.20	1.93	4.38

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.