In two of the last posts I talked about moving around in Emacs using the buffer list. Another way of jumping quickly to a buffer is setting a bookmark. A bookmark can be set using C-x r m (for bookmark-set; for me “m” stands for “make”, so I can remember the difference between the different bookmark commands). Emacs asks for a name and after Enter saves the bookmark.
Moving to a bookmark can be done using C-x r b and entering (the first letters of) the name of the bookmark and use Tab to complete the name.
With C-x r l you can produce a list of all bookmarks and edit your bookmarks (delete with d) or use the list for jumping to a specific file (with f or j).