Building your own musical instrument is a project of immense pride and skill. And there aren’t many instruments cooler than the electric guitar. Here are some great sites with instructions on how to build your own:
Rick Eesley’s page – Lots of detail and info. Shows three kick ass looking guitars he’s built.
Instructables – Very highly rated set of notes
Project Guitar – Tons of resources for anyone undertaking this type of project
How to build a Les Paul, the hard way – The GOD of electric guitars. Warning, some links are broken