First dig 1 block down. Count 4 blocks to the left and dig 1 block down. 4 blocks left again, dig one down. Repeat one more time. Then plant a sapling.
In contrast to Wolves and Cats, Horses, Donkeys, and Mules don't need an item to tame them. Instead, get close enough to them and interact to get on their back.
Place your anvil and put your name tag in and rename it Grumm Capital G and 2 M's then take it out of the anvil and just left click on a mob to name it Grumm.
There are two main methods to allocate more RAM to Minecraft: through the Minecraft launcher and the Minecraft server. However, there is more than 1 launcher in.