If you're wondering why you seem to be getting more forgetful, you may find an answer in this very interesting podcast from The Sunday Edition, hosted by Michael Enright who is probably Canada's best radio journalist.

I found it extremely enlightening and...um, er, wait, it'll come to me.....

RE "Why we have to forget to remember"

'Twas indeed ... although a bit more detailed than many might be able to comprehend or appreciate.
Of course much of the discussion revolved around info that has been known for a long time.
And for those who might be dealing with others who have Alzheimer disease or other forms of dementia, the major role which emotion plays in memory retention/maintenance [limbic system] is worth understanding and remembering.