First trick: When you are starting in minecraft it is very good to know how much durability your tools lack, you will have noticed that the durability bar goes down to your tool but you do not know exactly how much durability it has, so here we leave you the durability of each type of tool. Wood: 60 uses
Stone: 132 uses
Iron: 251 uses
Gold: 33 uses
Diamond: 1562 uses
Second trick: when you already have advanced a bit in your minecraft world and you already have iron pickaxe, you should start looking for diamonds, for finding them easily, the best way in mupy own opinion is doing straight mining in the layer 11.
Minecraft Tricks 