Since you likely use it every single day, your EDC backpack should be easy to use. But easy use doesn't have to mean simple or sub-par construction. Dump the old JanSport and opt for something with a little more oomph - like the United by Blue Rift pack. It's got 25 liters of internal space across a litany of pouches and zippered pockets (both inside and out), a 17" padded laptop sleeve, a water bottle pocket, and a Durable Water Repellant finish to protect all your gear even in a downpour. This is an everyday pack you can literally use every day.