To help fast track setting up new Rails applications, I created a blueprint outlining steps for adding common functionality using some handy templates.
To get started, simply clone the repo into a folder with the name of your application.
git clone https://github.com/dalezak/rails-blueprint.git my_app
Then move through the list in the README.md doing any of the sections your application needs, and skipping sections you don't need.
This is still a work in progress, so plan to add new sections as well as provide other options for existing sections. If there are sections you'd like to see, let me know.