Screening well is great insurance against that, but bad ones do slip through the cracks here and there. 

Or, they might slip off the hook never to be seen again (dead lead).A friend of mine from Australia uses VOIP.

I have gotten extremely close and let one slip through my hands but was my own fault because I didn't understand my market enough.

.- My grades and focus on dentistry (I'm a dental student) were slipping.

You're better off taping it next to the garage door or slipping it in the crack of the front door leaving it exposed.

CONS: -In the back of my mind I feel like I might be letting a few deals slip through the cracks that could have been good sub-to, lease option, or other creative deals.

Look out Rockwall, your gateway to DFW is going to slip away. 

You can either preprint deposit slips for the year with the unit # and hand them out, or tell the tenants to write the unit # on the deposit slips at the bank.

Once you know the basics I think I would dedicate my time to listening to seller calls, recording and listening to yours to identify mistakes* (legal in most states..Not California though which is where you are), *I still talk took fast, say "uh huh" too much and let good opportunities to assess motivation slip by. 

@Michael QuarlesI'll look into this some more.All of this is reinforcing the fact that my lead capture needs to be just as on point as the marketing if not more because there isn't anything worse that putting in the work to get the lead just to let them slip through the cracks.