My memory is not as good as it once was. Especially involving numbers. (I once was REALLY good at remembering phone numbers. Not a Savant (Rainman) level of knowing phone-books, but any number my mother ever needed (she would tell me to remember a number, and I could memorize the pattern of the numbers on the dial-pad.)

After the operation, I can only remember things that I concentrate on, and tell myself that it's important. i.e. I know Wednesday is garbage day, but I don't know what day it is today. Or another example, I know my wife's birthday is June 2nd, I just can't remember the year.