If you're having trouble with organizing your ROM hack, use
Lunar Helper or
Trinkets.
Check out the site's
Frequently Asked Questions section. You might learn something new from it.
This page is full of useful diagrams on the more technical aspects of SMW. The
Data Repository Forum is full of other threads like this.
This tool can preview .bin graphics files, it will save you the trouble of remembering which graphic files are what.
This is the Glossary. Whenever you don't understand the meaning of a word you've seen here, check this page out.