Even the best of job opportunities have their downside, and the decision to change jobs should never be made lightly. Once the decision has been made, however, it should be firm and final because reversing it could be a costly career mistake.  Since last impressions can be more powerful than first, it's a good idea to do all you can to be remembered as a professional and keep your references intact.

Counteroffers are one talent-preservation tool companies use to prevent employees from leaving and your employer might appear to be doing you a big favor. Don't be deceived, though. Rarely, by accepting a counteroffer will it work in your favor.