Mods

Mod is something new added to the game, example: Too Many Extras, Modloader, etc!

To install one do:
Start > Run > %appdata% > .minecraft > bin > minecraft.jar >>RIGHT CLICK<< > Open With Winrar

Delete Meta-INF
And then, put in the .class and folders from the mod .zip/.rar Into minecraft.jar

Thank you :)

Controls

Now, Minecraft is an awesome game and makes you build and everything, BUT, What if you don't know the controls? That's why I am here to teach you how to play! Here are the controls:
W - Forward
A - Left
D - Right
S - Back
E - Inventory
Q - Throw
Space Twice - Fly (ONLY IN CREATIVE!!)
Right Click: Place Block
Left Click: Break Block

Now we can change these controls very easy like this:

In-Game:
Esc > Options > Controls

Main Menu
Options > Controls

That's it :) Hope you enjoy Minecraft!