A simple conversation with people that you know will be effective in keeping memory sharp, a group of researchers from University of Zurich reveal.

Lead researcher Dr Mike Martin said that such social interaction could prove to be as effective as modern memory training exercises that have grown to become a multi-million dollar industry.
Commenting on the various studies on the subject, Dr Martin wrote in his report, published in the journal Cochrane Library, that while longer and more intense memory training is beneficial, alternate interventions could also help the elderly to slow down the process of memory loss.
Source-Medindia