Social Security uses a 5-step sequential evaluation process to evaluate disability claims.

The most important task for a disability lawyer is to formulate a complete and detailed theory of the case, which covers all five steps of the sequential evaluation. 

If you cannot articulate why each step of the sequential evaluation should lead to a finding of "disabled," you cannot fairly expect an administrative law judge to make a fully favorable decision.

Develop a winning theory for every claim. Make sure your theory of the case covers all five steps of the sequential evaluation. And develop the medical evidence and testimony to support your theory.

If possible, have 3 reasons that preclude past work and other work.