Are you diligent about separating colors, lights and darks? Do you have some other crazy system?

I usually separate towels and sheets into their own load, baby clothes into one (always washed on delicate), DHs work clothes, then our clothes into another. I sometimes separate denim, too, but usually don't sort beyond that unless I have something really white that I'm worried about getting dingy, or something new that might bleed. I need to step up my game and do lights and darks at least!!