Making a career change without refreshing your network and finding a new mentor. Don’t ever try a career change alone. When you have chosen the career field you want to be, begin developing new network contacts. Networking is basic for all job-seekers and specially for career-changers. And use a current or new mentor as a sounding board to help guide you in the transition.

Changing careers without learning all the possibilities. Don’t switch career fields without examine all the possibilities, including career fields you may never have considered. By conducting research into careers you may find the career of your dreams. The more you know about different career choices, the more successful you’ll be.

Making a career change without estimation of likes/dislikes and without self-consideration. Self-assessment (of your skills, values, and interests) is one of the importance element to career-change success. Make a list of the skills you love doing and hate (in your job, in your hobbies, in all aspects of your life). Next, try to do assessment tests with a career component. All these you need to understand yourself better so that you can find the best career for yourself.

Changing careers based on others success. It’s human nature to compare ourselves to others. If somebody is successful in a certain career does not mean that you will be happy doing it.

Changing career without needful experience/education. You must find a way to eliminate the (experience, skills, and education) gap between your old career and the new one. It is often necessary to obtain extra training and experience before you can find a good job in a new career field.

Changing careers without correcting job-search skills/techniques. Take the time to improve your job-search skills, techniques, and tools. Examine your resume-writing techniques, master networking, and perfect your interviewing skills.

Final Thoughts
There are so many different books, literature and sites that there is no reason to make any of these mistakes. But if you do make one of them, try to find the way to fix it … a career should not control you; you should control your career.