When searching for work you need to ensure that you give yourself the best chance possible to land a job. If you are looking to change career then you may not have much experience in the job that you want to apply for. It is vital that your CV is up to date and contains no silly errors that could cost you an interview.
There are places you can go to help you find a job such as a recruitment agency or the Job Centre. The internet is also a great tool to use to aid you in your search for recruitment. When searching online, browse a number of jobs boards and see if you have to register to find out the details of jobs that are advertised, some will only show you contact details if you have an account with them. Some jobs boards are free others will charge, but most will offer you a free trail.
If you are looking for a job in a specific industry then you may want to find an agency to sign up with that specialises in that industry as they are more likely to be able to find you a position.