This video shows how to use Eagle PCB for layout design.
Part 1 (schematic):
Part 3 (finalizing design):
Part 4 (custom library):
Table of contents below:
00:00 - Introduction
00:18 - Making a board from a schematic
00:41 - Grid settings
01:29 - Saving the design
02:30 - Placing components
04:44 - Changing board size
05:05 - Airwires
05:28 - Ratsnest
06:20 - Ground plane
12:02 - Routing
14:48 - DRC
17:24 - Erasing wires