In any football match, check the last 5 games between two sides and see if either has had a 0 – 0 score line during that period. If there has not been a 0 – 0 scoreline then that is your game to bet on for there to be at least 1 goal scored.
The odds will be very restrictive such as 1/50 or even 1/100 but if it is a guaranteed return you need then it is pretty safe.
Bookies make their money on certainties not being certain, so sooner or later the system will break down so keep an eye on whether these teams are strengthening their defence or see if the main strikers are still hitting the targets,