###### How do I set the page margins?

Latex has a package called geometry which deals with page margins. Add

\usepackage[margin=<x>in]{geometry}

where <x> is the desired margins

###### How do I set proper labels for my numbered lists?

Latex ...

###### How do I skip numbers in numbered lists?

Latex ...

###### How do I have cells in tables take up multiple rows/columns?

Latex ...