Curt over at the Occupational Adventure offers a PDF of his latest article in Worthwhile Magazine called, Reinvigorating Without Quitting. It´s a great article so check it out. If you want to figure out how to add more spice to your career, I would also recommend Curt´s e-book as it is very well done, thought provoking, and helpful.
The thought of making a change without quitting is interesting. Many people suffer from the "greener pastures"?? virus. This bug makes everywhere else look better than our current situation.
Seriously though, think about whether you have this tendency…. You really CAN enjoy what your are doing right now.