Google Scholar is a great thing which you can use to monitor citations of (your) papers. The major problem I have with Google Scholar, though, is that it does not expose any metadata about papers and citations. I have thus created a simple solution that allows you to extract papers’ titles and their citation counts and expose them in an atom feed. A nice thing is that all you need for that is Google Spreadsheets.
See my citation spreadsheet and the related atom feed for more details. In case you want to have your own, just create a copy of the spreahsheet (File/Make a Copy), change the value of the name field or change the Google Scholar URL as you like (on the input sheet), and share the citations sheet as Atom feed (Share/Publish as a Web Page and then select the citations sheet and the ATOM format). After that just add the feed as a new subscription in your favorite feed reader. Note that the feed gets updated every 5 minutes (this is what you cannot influence).