"Awareness" -- the visual working memory -- could depend largely on your ability to filter out irrelevant information, rather than the amount of memory storage you have.
A study used a new brainwave measuring technique to record mental effects as objects entered into a subject's awareness.
Study participants were asked to recall specific shapes and colors -- remember two and forget two others -- while performing computer tasks.Patients who possessed lower capacity visual working memory remembered all the shapes and sizes researchers mentioned. Those with a better memory, however, dismissed the "unimportant" information scientists asked them to forget.
If you keep forgetting where you put your car keys, don't blame it on a "senior moment" or a lack of intelligence. Finding those keys likely depends on how quickly your brain can filter out unnecessary information.
How well your memory performs also has everything to do with making healthier lifestyle choices, so here's a few to help you get started: