Deciding to sue someone is never a decision to be taken lightly, and your first step is to find a capable attorney skilled in litigation law. A tried-and-tested way to do so is to consult with friends and family who have been in similar situations, as to ask for their opinions on the lawyers they used.
If you've got a personal injury case that needs to be pursued, don't just select an attorney that dabbles in litigation law -- get one who does it full time. It's always a good idea to get a specialist, because they know that field inside out and can help you where a generalist can't.