I am 60 years old. I have a very good, carefully groomed personal database of information that I pay attention to every day. A good database always outperforms young spongeheads. Young geeks revel in keeping everything in their head. Older geeks know that it is better to not clutter up the synapse with a collection of process list information (that is what it most often is). Who cares if I know the 25 steps to Web site security? Do I have access to those steps? What about the 25 different experts who all have 25 different steps? Do I have access to them? Do I need all of them? (probably do) What is their relative value? Do they apply to this situation? How much time do I have to try and remember them? Just bring them up off a database (right now!) Less stress, more complete, more interesting, more fun, more professional.
So, get yourself a very good, portable, personal database that you groom every day in a disciplined manner. I am more and more impressed with sqlite. If you lack discipline to create and maintain such a database, no one can help you. But you can help yourself.