I start with the two month group. When I take a F8 out, I match fabrics, cut it out, make it, measure, take a photo, and put it back into it's little baggie marked with the owner's name. It goes into a gallon bag clearly marked with the 2 month group's name. Then I post a picture to my album. I label the pic with the owner's name and the name of the block. Then I post the pic here.
So far, I've only had 1 finished block go awry. I was using priority envelopes for my return envelope. As the postal clerk weighed my finished blocks for return postage, 1 block disappeared. Talk about a heart attack! Luckily, the owner used the same fabric for both groups, so I had some scraps left plus a little help from friends with scraps. Now, I carefully conceal my $6.80 in cash and seal that sucker up tightly at home. That is a sick feeling when you know you made a block and it's not there when they get to Janice. I stick strictly to my routine now and all goes well.
Each person will work out a routine that works for them. Main thing is.....just have fun with it.