My husband always has projects going on around the house and most of them get him really DIRTY! Until now I have always had a problem with his "good" clothes and his "work" clothes, a.k.a garage clothes getting put in the same drawer together. Thankfully, now they are kept separate and when laundry day comes sorting them for their drawers is a no brainer. All I did is take his work shirts and put a big fat "W" on the tag, now the work shirts go in his designated garage drawer and his "good" clothes aren't at risk...well...less at risk. He has really been enjoying how easy they are to find and put away.
This system works well if you have help doing laundry. Marking the tags makes it easy to distinguish which clothes can go in the dryer and which need to be hung on the drying rack.