Actions and filters allow you to modify how a plugin works without hacking away at the plugin itself.
I recently spoke again at WordCamp Buffalo. I saw a lot of great talks and met some passionate WordPress designers, developers and users I normally wouldn’t have! The talk was an Introduction to Backbone.js and the slides are available here along with an example plugin you can use to get started. TweetShareShare
The video from my talk at WordCamp Buffalo 2013, Geolocation in WordPress, has been posted on wordcamp.tv. Was a great event and looking forward to attending more WordCamps in 2014! Slides can be found on SlideShare TweetShareShare