Before you change careers assess why you might want a change. Often it isn't a change of career that is necessary. Here are some questions you can ask about where the dissatisfaction exists:
--Do you like your current company?
--Do you like your current boss?
--Do you like your current fellow employees?
--Is there an issue in your home life affecting your work?
--Do you like your daily work?
--Do you like the potential of working at a job related to your current career?
--Do you prefer to work alone, in a team, or a bit of both?
Frequently a person wants to change careers when the issue is the company the work for, the boss (one of the most common reasons), or fellow employees and their actions. You must first analyze whether your unhappiness is truly with the career or another reason. Sometimes the motivation has nothing to do with work, and is something happening in your personal life. If, after evaluating the above, you determine the reason is still the work, then you need to ask yourself if you might like a related career, something different within your current company (maybe you aren't challenged anymore in your current role), or if you are working within an environment that isn't ideal? Too many people have changed careers when the real issue was something else entirely. Make sure you investigate all the possibilities before reaching a decision. To your career success!