Vertical Alignment

In beamer, math mode, and some other situations LaTeX doesn’t render a visually pleasing amount of white space.   One way to resolve this is (and one I typically use in beamer) is to use the vspace command.
Details on vspace with examples.

Depending on the document, sometimes vspace does not work.  Instead you may need to take advantage of a little known feature of the new line command \\.  The command \\ can take an optional length parameter \\[<arg>] where <arg> is any LaTeX length, e.g., ex, em, pt, in, px.

Details on \\ with examples.  The number can even be negative.

Nesting Operators

Talk about your bracketing stuff.

Readable Figure Captions

From Mark

Block Comments

From email

Storing Variables for Commands

From binder

Tables

Multirow, multicolumn, sideways text

Useful Packages

List ‘em here

Misc

http://www.tug.org/pipermail/texhax/2008-October/011109.html

http://people.cs.uu.nl/piet/floats/node1.html