I'm stuck at work now, when I get home I'll try to link to the video where I learned the backstitch technique I'm using. :)
I used to cross stitch too and I'm thinking of getting back into that as well. I don't think I ever had a problem with knots with that though, if only becausey thread was so much shorter. I'll have to try the needle technique, but I think I might need to be careful. The needle I'm using is pretty thin and fragile.
I'm really looking forward to your decoupage post. I live seeing what other people make. You should throw in a bonus cross stitch pic or two as well. They're probably awesome. :)