Betsy's got a smart plan for weeding out outgrown clothes:
We get a ton of hand me downs, some without tags. I looked in my youngest kid's drawer the other day and he had WAY more shirts than I do. So I went on a weeding out campaign.
Step 1: stop putting his shirts back in his drawer. Fold and hide them in the guest room.
Step 2: when he puts something on that I notice doesn’t fit or is really just too embarrassing to wear, I try to get him to change and pack up the offending article right then.
Step 3: when he refuses to change and it isn’t a battle I’m choosing to fight that day – I mean it's just a little sliver of his belly showing, how bad is that for the day? He’s only 3, it isn’t picture day! Well, then I attach a little safety pin in the back. That way, when this shirt makes it through the laundry in about 4 weeks I remember to pack it up then.
The problem this solves is that before the safety pin trick, by the time the too-tight item got washed I’d forget whether it fit or not.