Tips and Tricks
Infinte Diamonds Or Any Resource
Get 9 Iron (dimond, gold, etc. ) turn it into a block and once you do this mine it out switch to an empty slot and place it fast. If you Do it fast enough it'll say you still have itand you can recraft it into iron ingots. (May take more than one attempt).
The truth is, if you're underneath a beach or there's too much gravel for you to dig, simply take out your torch and mine the block of sand/gravel and quickly place a torch in the place of that block you just mined. Now, kick back and relax as the torch destroys those pesky blocks of sand/gravel.
There is also a "theory" that the torches in the game itself can hold any block placed above it so it comes handy most of the time.
If you want to duplicate Iron/Gold/Diamond blocks then you're in luck.
First you might want to mine for 9 of these materials to get either 9 iron/gold ingots or 9 diamonds. Once you get these, go back to your safe place and craft a block out of those 9 items you just got.
Now that you have this block of iron/gold/diamond, place it down. Make sure your pickax is the only thing you're carrying and everything else is put away in your inventory. Now, mine the block, press R1 and place down the block before it is even equipped. You should see that you are holding a copy of the block you just mined but the original is still on the ground. Press Square to bring up the crafting options and press L1 to go to decorations and turn the iron/gold/diamond block into ingots/diamonds. It might take a few tries but you will get it eventually.