Psychologists have done experiments which show that packing more events into your life stretches out your experience of time (see this podcast).
In one experiment a psychologist locked himself up for two months in complete isolation. When he was pulled out he had only one month of entries in his journal.
In effect he had lost a month. Time as he experienced it halved.
Collecting as many memories as possible is not too bad a goal. One day does not become indistinguishable from the next; years don't have rhetorical postscripts about where they went.
I wonder how much time is expanded by taking vacations; living in new places and doing new things? Is there a limit to expansion?
Learning how to retell memories well and remembering to jot them down may be good habits also. Then again I am not a fan of sentimentality. Maximising 'future memory' is the way to go.