If you haven't already, check out Amy's videos here
- sometimes I think it's easier to see it to help get a rhythm down. I knit conti, but I have the same problem with uneven tension when I knit English - it gets a little better when I keep at it though. You might also switching up how you hold the yarn - I have to hold different yarns different ways depending on how smooth they are just to keep the tension right.
Good luck with it!