Whenever I try out a new 3D program there are three main functions that I worry about figuring out immediately:

How to scroll the screen up, down, left, right
How to orbit or rotate the screen
How to zoom in and out
and How to undo my last did.

-In Blender, holding down the middle button or wheel on your mouse will orbit or rotate
-Ctrl + up, down, left, right numpad keys scroll
-Right click, hold and drag moves the actually object up, down, left, right
-Wheel zooms in and out
-Ctrl + Z cleans up your last sloppy accident.

Also, your editing and main toolbox is displayed by holding down the right mouse button for a few seconds in the main work area or simply hitting space bar.