Re: BOOK TRAILERS DO THEY HELP?
My books are just barely out, so I can't comment on the effectiveness of the trailers. But I had a lot of fun making them. You don't need to be too well-versed in editing software to make a decent trailer, because most of the software that comes free with your computer (iMovie, Movie Maker, etc.) is pretty easy to use. That said, I do have a background in video editing, so I found the whole process fairly easy.
Just make sure you have the rights to use the music and images you're using. I used my own artwork, plus images from wikimedia commons, plus the royalty-free music that comes with iMovie. I was even able to easily add thunderclaps, jungle animal sounds, and other sound effects, to make it sound a little more professional (especially on a nice sound system).http://www.youtube.com/user/AuthorLonDee
There are a lot of uses for trailers. I made a YouTube channel, plus added the trailers to my website and my AuthorCentral page on Amazon. They're also great for advertising on facebook.