Purl Bee has a very nice tutorial, and there are tons of others out there, too. I absolutely despise seaming and weaving in ends, so I just crocheted the grannies together as I went along, crocheting right over the ends, too. I should have taken pictures as I went along, but I did a quick search and this seems about the same as what I did.
Anyway, now that these projects are finished, I have to find something new. Or, maybe finish up a few of the dozens of works in progress that I've already got going?