- A Simple Frontend Strategy for Mobile Webapps, or, How we Built Hacker News Mobile provides some useful information on the technologies used to implement the site
- Use The Index, Luke! is a great guide to tuning SQL and SQL indexing
- The Joy of Indexing follows on from the link above and details how and why indexing is important
- ruby-style-guide should form the basis of a your coding style
- Understanding Linux CPU Load - when should you be worried? can't ask for a better explanation on how how to interpret top and uptime
- Decorators with Zend_Form although it still seems like black magic to me
- ifttt other otherwise know as if then this that allows you to trigger certain actions when events occur. For example each time you check into a place on Foursquare you could schedule items to occur