These are very useful. Can we have quick links of them while answering or on sidebar of questions under some link?: Catalog of limits, a, MathJax basic tutorial and quick reference, List of comment templates, List of Generalizations of Common Questions
I don't think this will happen, but you could always use your browser's bookmark functionality for this. I've made some pastelets for the comments from comment templates and put them into a bookmark folder, for example.
All of these were made at pastemark.ru using the target @comment. For some reason one of the comments doesn't work with this site however (I forgot which one).