Did u see the video's on this site at http://www.knittinghelp.com/videos/knitting-tips
You can un-knit which is great if you need to do just one row. I don't know if they show that on this site's videos. I also learned by DVD's. The best DVd for fixing mistakes is "The Complete Beginner's Guide to Knitting (2004)". You can get it on amazon. I would check out these video's first.