Basically, you set the ACS to search the graveyard by name, in descending order. Then you go through species by species and write down any names you'd like to grab. After that, check them every night at reset and take any you notice are open.
It can also be pretty important to go through the ACS again to clean up your list after each night where names have cleared. That way there won't be a lot of names on there that have already cleared and been taken again, all getting in your way for no reason. Having things get in your way is the last thing you want when you're in frantic grab mode. xD
Oh, and there's a thread to help a bit with list cleaning, so it doesn't end up being such a huge ridiculous job. P:
[link]