This is such an easy thing to do, and it makes life easier in every way. Put the full date (day, month, year) on everything -- recipes, school notes, things you jotted down on a post-it-note at work, everything you save on your computer. It makes it so much easier to figure out where something is ("I think that photo was from 2011, so let me search that folder"), what do study for ("Our test covers everything from the past 5 weeks"), when something was given to you ("Boss discussed this topic with me 9 days ago"). It takes one second to do, and can save you hours of hassle and panic.
 on everything -- recipes, school notes, things you jotted down on a ...&redirect_uri=https%3A%2F%2Fwww.tipmine.com%2Ftips%2F5807){kind=link}
 on everything -- recipes, school notes, things you jotted down on a ...){kind=link}