Giving casual advice over lunch is not the same as assisting parties whose objective is to gain personal or financial advantage from your expertise. First, establish the value of your time and expertise, and then address your established compensation rates early on. Several ways to approach your fees are: Hourly/Daily, Retainer, and Shared Risk/Shared Reward. Each has benefits and challenges, but each offers alternatives for professionally assisting others and dealing with those looking for a free ride.