Have confidence to face any problem that can happen in the new work place. Every transition is an experiment. You need to assess the changes you can make in the new place.
Once you made a change in the work place, try to stay there for at least one year. It may be a time of tension if the new entrant for the first 3 months. So whatever problem that arises between the boss, colleagues etc may be temporary. So staying in a firm for at least one year is mandatory for a good career.
Before making the transition, try to find out more about the firm you have selected. Assess the position you have been offered before taking it. Do not take up a job only seeing the position and power; you need to know the risks also. It is not needed that because, everyone changes a career, you can also change it.
If you want to make advancements in your career, try to learn new things always. You need to try to implement your decisions until you could achieve it. Always try to improve your communication skills.
See that the firm you are trying to move into is financially stable. Analyze the positives and negatives of the present and the future firms. You should be sure about why you are changing your job.
You should maintain perfect balance between your work and family. It is necessary to have support from your family when you make the transition, in order to contain the pressure at the new place of work.
Don't change your job very often. The change should be for fulfilling your career dreams.
Finally don't deceive your current firm and go to another one. That will be a permanent black mark in your career.