Needles and Yarn??

Yep, I've decided to give knitting a shot. I don't think I know what to do past the first row though. I successfully "cast on" the yarn on the needle and did one row of the "knit stitch," but beyond that I messed it up. I'm not really sure what I'm doing wrong, but once I get myself going I'll be knitting up a storm! In the meantime, does anyone know how to start the next row??