A simple and effective workflow for building and maintaining Shopify themes that allows for using any editor, Git, and multiple store environments.
This screencast covers ThemeKit v0.4.2. Specific details and config options may have changed since.
Here is the blog post with the full written out workflow: http://www.brettchalupa.com/shopify-theme-development-workflow
Gist with the config code: https://gist.github.com/brettchalupa/45cf868815fd5e60e85679895371c566
View more screencasts on my new channel: https://www.youtube.com/channel/UCQXaIyeRqHjK9EK41b8J3yQ