I have a bookmarklet that points to:

  javascript:(function(){daurl='https://web.archive.org/save/';if(location.href.indexOf('http')!=0){input=prompt('URL:','http://');if(input!=null){location.href=daurl+input}}else{location.href=daurl+location.href;}})();

This has the keyword "way" in my Firefox bookmark.

So when I'm on a page I want to save, I just press Ctrl-L (to focus the URL bar), then type "way" to save the page on Wayback Machine.