ArcGIS "How to" and Reference Documents

Digitizing tips and tricks
Helpful hints while digitizing, and simple topologies
ESRI Editing in ArcMap

Video: Create shapefile
Video: a) Digitize points, b) Digitize lines, c) Digitize polygons
Video: Edit lines and polygons
Video: Efficient digitizing
Video: Simple topological edge editing

Video: Georeferencing files

Geodatabase topologies
Editing topologies
ESRI Geodatabase topology white paper
ESRI Building a Geodatabase

Geoprocessing in ArcGIS
Using ArcMap
Using ArcCatalog