I know that one can vote up other people's question and the answer or comment to that question. I am wondering that if there is a way to "save" or "mark" the favorite questions or answers from others? It seems that one can only do this for his/her own questions.
Edit: I think my question should be: how to go back to the questions or answers I like?
In the Firefox Browser, I use the "favorites" button to save things I want to go back to. I believe that similar features are available in other browsers and so this isn't something that stack exchange needs to address.