Referrals are a good place to start. Ask friends, neighbors, family and co-workers if they know a broker, planner or other financial adviser whom they would recommend. Ask what they like about the person, as well as what they dislike. The next step is to take those names to federal and state regulators. You'll be able to find out whether the adviser or broker is registered with regulators and whether he or she has a history of legal problems.
Some advisers fall under the scrutiny of specific groups.
Stockbrokers, for example, answer to the National Association of Securities Dealers. You then can request those disclosures. You can ask for the same information through the state offices. Visit the adviser prepared to ask specific questions. Ask for a copy of Form ADV, which registered investment advisers submit to regulators.