You can contact your state bar association and find out if they have complaints filed against the attorney you are thinking about. Determine the area of expertise of your proposed attorney, i.e., criminal, civil, corporate, personal injury, tax, probate, to name a few. How long has he./she been in practice? What law school is their Alma mater? How many cases have they won or lost? This is some of the things to check before hiring a lawyer, but, buyer beware, there are just as many rip-off lawyers as the are good ones.
Seriously, get opinions from other lawyers in relation to how agressive you want to be. Warning signs would be how much the lawyer wants to tear the other person apart. You can find out whatever record you want... if you have that much time to scout out the thousands of records at the courthouse files. Word of mouth and referral is best.
Word of mouth would be my option, ask around to friends ,family etc and see who they may have retained before and for what reason... maybe put a ad in your local craigslist asking for solid recommendations.
first be sure he/she is the type of lawyer your looking for (criminal, corp.civil,etc.); then you might want to check their record out and finally your price range.
Its hard. Personal recommendation is the best way.
ask the other cats in jail who their lawyers are...then hire somebody else