I was thinking something along the lines of these (officeworks link) (simply because I’m lazy and couldn’t be bothered getting anything professionally made), and would be very surprised if something like this would leave any significant amount of residue, there’s simply so little adhesive to begin with. This stuff’s totally different to PVC/electrical tape.
Regardless, I’m not too concerned about what label is used, so long as by the end of the year, all items of interest are labeled in some way, shape, or form.
(I just thought a direct application label was less likely to fall off most things than rubber-banded on, but I know how much some people dread adhesive decay)
As for post-it notes, because they’re only adhered partially they very often get caught and can peel off. They also use the same adhesive as the stickers I mentioned.
There was a third category of stickers I neglected to mention, which was “Property of MHV, hack with prejudice”, for things like the MAME cabinet, space probe, items of key interest, but I didn’t think they’d get thrown out anyway as all committee members know what they are.