Alot of peeps been writing alot of combos/tips that don't work or have errors in them. Examples of most common ones:

Monster Reborn + Gate Guardian + Cheerful Coffin

Cannon Soldier + Last Will + summoning unlimited monsters from deck

Whole others have small errors like saying Steel Scorpion kills your opponent's monsters in 1 turn.

I suggest that you should check if your combo/tip actually work before posting. You can do this on Pojo's Board under "Single Card Discussion"