I also keep all of my editable files, but I no longer save them as PSDs. I'm also resaving all PSDs as TIFs. When I have enough layouts done to fill a disk, I back them up on a DVD, either by person, event, or year. Each layout folder contains the final TIF file, the web thumbnail file I published online, a notepad file with the credits, and any supporting files I created to build the layout. Sometimes, I accumulate enough layouts about a particular person to burn them all together on a single DVD.
NOTE: I tried those DVDs that you can use as editable disks, like a jump drive, but I didn't like them. In fact, I messed up once while saving a bunch of kit files and lost about half of the zipfiles I had collected for an advent blog hop. Bummer ...
In re: printing, a long time ago, I bought a HP Deskjet 9800 printer that can do 12x12 sheets and posters. However, I only printed a few LOs with it, mostly because the ink cartridges were so expensive. Unfortunately, I did some publicity work for a candidate during the election campaigns one year. Using one color only (green) messed up the settings on the machine. I haven't had the time or money to get it fixed, so that printer just sits.
My small printer got messed up during tax season this year when it jammed and I pulled the torn pieces out in a hurry. Now it displays a permanent paper jam message even though it has been cleaned thoroughly and no longer has a paper jam. This is a known problem with older HP Officejet 4500 printers.
I don't know if this problem has been fixed in the new HP Officejet 4500 model. What I do know is that the ink cartridges for the older 4500 printer are different from the ones used for the current 4500 printer, which leaves me with a bunch of ink cartridges I can't use. I have truly come to dislike HP printers completely and totally!
As far as printing services are concerned, I haven't used any of them, mostly because I haven't got enough of any one topic to complete an entire bound album. This is a big goal of mine, though. I'm very happy to hear that ArtsCow is good, reliable, and inexpensive. Delivery time is not an issue for me. I also would like to try Persnickety Prints as I hear they provide super excellent service.
Thanks so much for bringing up this topic, Dani!