Prayer Etiquette?

I always wondered if it was bad to pray lying down.

I've heard stories about the power of a simple prayer. But I wonder, of the prayers that were answered, were these people laying in bed when they prayed? Because that's what I do and I don't know if my prayers are heard because this truly hasn't been a year to brag about.
My most heartfelt prayers are usually when I am lying in bed...sounds almost wrong but no, this is rated G for everyone. I hide in my bed when I'm not having a great day so that's when and where I find myself feeling the need to throw out a little prayer. But I always felt a bit guilty for not getting out of bed and doing it the "right" way or universal way which is on down on your knees. The humble way. But I am humble. I am beyond humble that I am past my knees and on my back (totally Rated G).
I know I am blessed in numerous ways but I just wonder if because I pray on my back rather than on my knees does that mean my prayers are pushed to the bottom of the pile? Or filed away under the "reply later" folder? Geez Lou-weez. These are very important questions and I wish there was a book on it so at least I know I am not offending anyone up there. But I guess all I can do is eat, drink and be merry despite it all. As long as George Micheals is in the background singing his song "Faith" to me I guess I will just keep on dancing and praying even if it sometimes feel like I'm shooting blanks. Like fishing, if I fish long enough I might eventually catch the right "fish" so if I keep praying maybe something will come through...