never plant anything without labeling it. we always think we'll remember but we don't : )

i make them out of old bleach bottles, well rinsed and cut into strips, use a permanent sharpie and you're golden.

Or at least, never sow anything without labelling it unless you know from experience what the seedlings are going to look like ;-)

Yeah, I usually don't label most cause I know what most are that I grow anually, but new ones of course I tend to not label as well and then start to think "I don't remember planting that."