I love the organization I achieve with Calibre, and the fact that I have every ebook I have ever read listed in Calibre. It really helps when I am tempted to buy a book, and check Calibre and see I read it in 2008. (When you are trying to remember if you read the Greek Billionaire's Nanny Demand or the Greek Billionaire's Nanny's Demand, it comes in handy
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Anyway, I have been runing up against space limitations in Dropbox. But I needed to keep all my books in Calibre. What to do?
Calibre allows you to easily set up additional libraries. You can do it by tags, publisher, whatever you usually sort by. I usually sort by Date Added. Yesterday, I set up a new library, called 2010 books. I copied all books I added to Calibre into that library. Then I went back to my main Calibre file, and removed all formats, leaving the metadata in place.
Although the ease of storing ebooks in the cloud was great at first, hearing the issues with Megaupload and running into size issues with my dropbox account, this is the best of both worlds. I can still use my main Calibre library to sort and organize my books, and when I need to find the actual ebook, I just look at the year listed for Calibre, and go there. I need to get myself a really big SD card, thumb drive and backup hard dive. The I can back up 2008 & 2009 and 2010. For now, 2011 and 2012 are staying in my dropbox account, but I can see I will probably be moving those at some point.
This solved a problem I have been having for some time, and hope it is useful to someone else.