The site's must-read articles document the basic barista knowledge and techniques that apply to all espresso machines:

• Espresso Machines 101
• Home Barista's Guide to Espresso

These articles offer more diagnostic advice:

• Perfecting the Naked Extraction
• Banish Uneven Extractions with the WDT

For HX espresso machine owners, add:

• How I Stopped Worrying and Learned to Love HXs

These and other noteworthy articles on the web are listed in this forum and on the Resources page. The Barista Tips & Technique's FAQs and Favorites rounds out the recommended reading. Again, these how-tos aren't specifically addressing the usage of a particular machine, but they build the foundation of knowledge that will carry a home barista well beyond the early learning stage.