Towards the beginning of the game when you have one of your first stone tablets and are unable to read tablets, a glitch that allows you to keep picking up more and more tablets, as long as you already have at least one. Click the tablet you have once and your character will hold it out in front of him and say "I can't read that." If from there you time a second click just as he's putting the tablet back, the game will behave as if you actually just picked up a second tablet. This can be repeated as many times as you like, as long as you get the timing right.