I keep forgetting how to create my own Code Snippets for easy use in Xcode projects. It is actually ultra simple:

1. write some code you’d like to use again
2. highlight it
3. drag the highlighted section into the Code Snippets library
4. that’s it!

To edit the description of your new snippet, single-click it in the Code Snippets Library pane, and up comes a handy dialogue box. Click edit and amend to your heart’s content.