I will be creating some of the important Jekyll snippets so that they can be directly inserted into a Jekyll website and with no or little editing they start working.
Here - along with the html and liquid code - I have included style as well. Now, it would be easier to implement these snippets. You may have to tinker some values like width, color etc., as per your requiremtnt.
You can always move the style to a different stylesheet or to the head section. But inlining style this way will actually speed up the page load time. But it may not get cached.
Jekyll Pagination
Jekyll Contact Form
Jekyll Subscribe Form
Table of contents
I have designed this so as to look like Wikipedia Table of contents. You can make chages in the style tag to personalize for your website.
Disqus Lazy Load
It makes sense to load the Disqus widget only when a user scrolls to the bottom. This code will automatically detect the scrolling and loads Disqus once you reach the bottom of the screen.