I left shit at home more often than I've brought everything lol im currently waiting on a 3mm to arrive at my house fed ex I left behind a cpl weekends ago. The beauty in my experience is divers aren't thieves. If I had all the $ I've given as tips for taking care of a left piece of gear i could likely buy an apeks regulator.
Oh I hear you! I seem to forget stuff somehow even when using a checklist. Don't even get me started on what its like for me to go to the grocery store ;)
Woops! That sucks! We once drove 4 hours to a dive site and when we got on the charter right before it left my buddy realised his dry suit was hanging up at home. :S