You can look up reference material provided at this site, as well as talk with your friends, relations. Depending on the circumstances leading to the termination of your last job, it may be necessary for you to choose another career from among many careers that may be open to you, based on your education, experience, interests and skills. Visit the Career Hints page of this website for guidance on selecting the career that is right for you. You also need to decide what kind of company you want to work for, in terms of large or small, and the kind of industry it is in. Next, you need to decide which companies you want to contact.
Internet is a good source of company information.
Most companies have websites that include information about what they do and the kind of people they are looking for. You need to prepare a good resume and a covering letter that is appropriate to the job you are applying for. It is said that looking for a job is a full time job in itself. Other sources of information about job availability are relatives, friends, recruitment agencies, newspapers and numerous internet-based Job Search websites that are mentioned at this site. Also refer to Job Hints page of this website.