Sorry to be the bearer of bad news, but me thinks not! You may think you've got it all stored up there, but the reality is most people retain little after a few minutes, much less days or weeks later. You may very well be able to keep up with 10, or 20, maybe even 50 clients in your personal brain bank, but there comes a point at which you can't track them all, with tasks associated, benchmark events and other "to-dos". If you're replying on your memory now, you're really doing a disservice to your business with the very limited information you can store in your head.
With a CRM, essentially a software contact management system, you can store and manage hundreds and thousands of clients for practically any purpose. A digital system handles all the tasks of memory, recall and, in many cases, calls to action, and so much more than your brain power could ever do on its own. Learn to take advantage of technological efficiencies for business success and watch your business grow in ways you've never imagined. Start exploring CRM's today.