I take copious notes during meetings so that I can accurately capture important information as well as action items.  I also capture personal notes such as birthdays, hobbies, spouse or kids names, etc.  I summarize my notes in my CRM, and I usually refer back to the CRM notes before meeting with the client again.  If there are referrals for the client that I need to make, I go ahead and create 3 way emails.  In many cases, I send the client or potential client a handout that will give them info needed for our next interaction.  These steps help me to remember little nuances about each client that i can mention during our next meeting, which lets the client know I am prepared and they are important.