Here is a screencast with a tutorial on creating your own bundles in e. It uses the todo.txt format as example, which is a simple plain text todo list format created by Gina Trapani, and shows how to add highlighting, commands, completions and snippets.

Creating your own bundles is quite easy in e. The documentation on this is still very limited, but the original documentation on the TextMate bundles format all apply (we just use JSON rather than the apple plist format to define Languages and Preferences).

The resulting bundle has been put on ebundles and can be installed from the bundle manager.

Many people think that learning to use Regular Expressions is difficult, but if you stick to the basics it is actually quite easy. This screencast and cheatsheet will give you a gentle introduction and allow you to gradually expand your knowledge into advanced usage.

Nothing can improve your ability to manipulate text as much as learning Regular Expressions, and it is not just in your editor. Just about any modern programming language support them, so you can greatly enhance your productivity and understanding of code by learning them.

The following screencast gives an introduction to the basics of regular expressions and shows how you can use them in your editor. The best way to learn is just playing around with them and watching the interactive feedback.

I have included a cheatsheet that you can use as a quick reference, and to expand your knowledge of Regular Expressions. I recommend that you print it out and gradually expand your comfort zone by trying out more and more features.