Gist is a simple way to share snippets and pastes with others. This is one awesome service provided by Github. It allows you to store code snippets for later use, you can have as many private gists as you need and you can group multiple gist files under a single gist.
If you frequently use Gist then there is a Sublime Text plugin which helps you to use it easy way. You can manually install this Sublime Text plugin from this Gist github repository.Or you can install it through Package Manager.