If the enemy team has a great level 1 invade, don't start at the regular buff spot

In other words if they have champions that always invade at level one such as Blitzcrank, don't start at the red buff on the blue side or the blue buff on the red side because chances are they will invade, you will burn your summoner spells, you will be behind from the beginning of the game if they succeed, and the enemy team will get first blood.

If you start at the red buff at the red side or the blue buff at the blue side, the enemy team will not be there to greet you with a Blitzcrank grab and a first blood, or you could even invade the enemy team's buff because they will be trying to invade your side.

The reason why it is successful all the time is because people don't prepare for these situations and they always follow the same patterns.