As I come across little tricks that other folks seem to need often, I'll post them here.

Excel

Exporting an Excel graphic to an editable file for Illustrator and others.

Powerpoint

Importing and Exporting graphics and Powerpoint.

File Translation (Import/Export)

Getting a file from one software to another.

Placing pictures in Powerpoint.

Scanners

What scanners can and can not do.

Scanners: Pixel Math and File Size.

Bits and Pieces

The USGS has a section devoted to geologic mapping standards. This includes a set of standardized colors and patterns-suitable for use in Adobe Illustrator.

Garr Reynolds' blog on professional presentation design, Presentation Zen.

Edward Tufte on Powerpoint