I have been going on this forum on Calibre and I guess my ADD is just not helping me. I have used Calibre for several years but I know I am not using it to it's full advantage. I have a large selection of ebooks and I just realized last week that I could go in, find all the different formats I have of ebooks, pull the format up, convert to Epub which is what I use and then delete all the other formats that I don't need. How helpful is that?

So I wanted to know where I can find threads on not really the beginning use of Calibre but more advanced things I can do with it. Any suggestions?
I guess what I might be looking for is a Calibre book for Dummies !!!