Truth is the original Celestia resources are by now very out of date (Pluto and Charon for example). I know about the existence of the Motherlode, here on this forum there are great addons too. However what is lacking is a single thread about every addon created or something like this (including compatible versions information). I will be glad to do it but I'm afraid that I will miss something...

Also, there are a lot of tutorials about how to create stuff but (maybe I'm missing it) there isn't a single one about installing stuff into Celestia. or it's too easy for a tutorial, I don't know, maybe it's just me?
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The thoughts from above are probably for their own thread, my idea here is this: What are, let's say, the top things you should do after a fresh Celestia install? How you can do it and from where you can get them?
And just to be clear - Celestia Origin is AWESOME but let's pretend we don't know about it yet (it's very big and in my case I prefer smaller addons with fewer stuff to begin with). What are your suggestions and tips?

Thanks in advance!