I've used this for a long time, but this article reminds me it's one of those OSX gems that few know about. Many of us do a lot of saving things to PDF's. The little PDF button at the bottom of print dialogs lets you do so, but if you want to quick-save it to a folder without having to navigate dialog boxes, you can add that as an option to the list using "PDF Services".
1. Put an alias of your desired save folder into the PDF Services folder inside your Library folder that's inside your home folder. 2. In a print dialog, select PDF popup at the bottom and you'll see the option to quick save the PDF to that folder. If it comes from a web page or a word document or the like, the title will be taken from the document, so often will be quite appropriate.