When I am ordering cards I order them by number of colors used and the colors themselves or lack of color as the case may be.
White, Blue, Black, Red, Green
Cards with no color.
Artifacts, Different land cards
White/Blue, White/Black, White/Red, White/Green, Blue/Black, Blue/Red, Blue/Green, Black/Red, Black/Green, Red/Green
White/Blue/Black, White/Blue/Red, White/Blue/Green, White/Black/Red, White/Black/Green, White/Red/Green, Blue/Black/Red, Blue/Black/Green, Blue/Red/Green, Black/Red/Green
White/Blue/Black/Red, White/Blue/Black/Green, White/Blue/Red/Green, White/Black/Red/Green, Blue/Black/Red/Green
I normally don't group by expansion but that is something that can also be added to help in finding cards that are still legal based on the rule set you are playing. Also if you tend to favor certain colors it would make sense to move them to the front of the grouping order. I just started with white because that was a place to start.