Many attorneys will offer this free of charge, before deciding whether or not to take the case. During the initial consultation or interview, the attorney will go over the facts of your case with you, and provide basic information on Personla Injury or "PI" claims.
Once a lawyer has decided to take on a case, it's time to research. This can include (but isn't limited to) gathering documentary evidence (often police reports, or medical records and bills), analyzing your insurance policy and coverages, interviewing any witnesses, and reviewing any other evidence, like photos of an accident scene.
Help Deal With Insurance and Medical Professionals.
Your attorney will likely review your insurance policy to see whether there are any coverages that may cover some (or all) of the medical bills while a claim is pending. He or she may also make suggestions for other coverages to buy, as well as notifying your insurance company of the claim. Your lawyer may also talk to your doctors, or get written reports from them in order to fully understand your medical condition.
Analyze Legal Issues
Your attorney will help you determine what you are owed legally, and who is entitled to any recovery (medical liens, etc). He or she will also have notified the insurance company of your initial claim. At that point, they will help you decide whether it's best to negotiate with them or file a suit. If a suit is filed, your lawyer will prepare you, your doctors, and any witnesses for depositions, as well as any other hearings and trial.
Be an Open Door.
You should have questions. Your attorney expects this. Personal Injury cases are very complex, and each case is different. It is thus natural for you to be confused or concerned about the process, and for your attorney to be there for you every step of the way.
The best lawyer will be the one who makes himself available to answer any questions you have, regardless of how many times they've heard them.