You can do it yourself by filing online or at your local Social Security Administration office
. If go to the office, it is best to make an appointment first, but not required. The application process is long and complicated. You'll have to prove eligibility, meet deadlines, and go through long waiting periods. Paperwork errors, on your part or theirs, can cause your claim to be denied. The easiest and most likely to be successful way to apply is through an experienced SSD attorney. Your attorney will understand and help you through the entire process, including your appeal if your initial claim is denied.