You can star a gist to add it to the "Starred" page. Starring makes it easy to find a gist again later.
Navigate to Discover and select the gist you want to star.
To star the gist, click Star in the top-right corner of the page.
Optionally, to unstar a previously starred gist, click Unstar. This will remove the gist from your starred list.
Starring makes it easy to find a gist again later. You can see all the gists starred by going to your Gist starred page.