Interesting video from Ben Heck with useful information for both beginners and experienced users. 20 minutes worth watching.
From video description:
Ben responds to viewer’s questions about 3-D printing by delivering a full tutorial! He covers the kinds of printers available as well as the basic parts and costs of building your own printer.
Ben also demonstrates how to find existing designs to print and gives examples of software for designing objects from scratch. After printing some objects, he shares tips and tricks on how to create the best prints possible.
Ben Heck is known for many of his 3d printing projects. There are two I find the most interesting:
How to build portable box 3d printer:
and his double-decker 3d printer: