start a search for another job. take the time to interview potential employers to see if they are a good fit for you. evaluate your current position, company and co-workers to determine why you are not happy, what will make you happy, what you want to contribute to your next job and what do you want to get from them.
work on your resume and cover letter
Be smart, don't leave your job unless you already have a plan B, something you are motivated to moving on to. Start looking :)
See a career counsellor
look for another oneand when you find it quit the one you are in right now....dont quit and look...look and quit