• Who to sue,
  • Where they are,
  • What you need to do before you sue them,
  • Where you should sue them, and
  • If you should sue them.

These are hard questions to answer, even in an easy case like a slip-and-fall in a store. For example, if you slip on the floor in a supermarket, you have to figure out if the store is part of a chain or just one store, if falling was partly or totally your fault, etc.