Learning How To Knit

I am a winter junkie.  I love the snow, and with that I love the clothes.  Scarfs, Beanies, Gloves, Sweaters, Slippers - I love them all.  Because of the cost of these items, and how most of the time they almost fit - I have always wanted to learn is how to knit - and this weekend my mom started to show me how!  I think now I officially have my slip knot, I can "cast on" , and I have the basin knitting stitch!  NOW - I need to learn where I am going wrong and why.  Anyone have any tips or tricks for knitting?  What should I start out trying to make?  A scarf?