For a long time I used Syntax Highlighter to embed code snippets in my blog posts. Last week I decided to switch to GitHub gists.
One tool that made my life a lot easier is Gister. Gister is a Visual Studio plugin that lets you push code snippets out to http://gist.github.com. Gister will package the active file or, if one exists, the selection in that file, create the gist and copy the gist url into the clipboard.