ScreenCasts

YouTube Channel

Basics

How to change Map Layout from Portrait to Landscape 

How to use the Find Tool

How to Add a BaseMap
How to Find the Date and Source of ArcGIS 10 Imagery Basemap 
How to Export your Map to PDF
How to change your Display Projection
How to convert DMS to DD with Excel
How to Label your Layers in a Map

Advanced

How to calculate NDVI with ArcMap 10.1 

How to Georeference Historical Aerial Photography in ArcGIS 10.1 
How to Geocode with ArcGIS.com
Using Textboxes in your Map Layout
How to Remove Black Border from GeoTiffs

Cool Tips

How to Sync/Match 2 Dataframe Extents 
Removing the Service Layer Credit Text

Google Earth

How to create an elevation profile (transect) with Google Earth