When looking for a job there are a number of places that you can use to start you search. Some people go to the job centre and either speak to an advisor or many now have online computer systems you can use to find jobs that match your skill / experience level.
Online jobs boards are quick and easy to use and allow you to search through hundreds of jobs at a time. You can often search by job type, location or salary and some allow you to refine this more by selecting qualifications you have.
When applying for jobs make sure that you have an up to date CV ready to send out and always tweak your cover letter for each company that you are sending the CV to. The Covering letter should be quite specific to the job you are applying for whereas your CV is likely to be more generic.