Hello there Dan and other folks,
First of all Dan, THANKS for your awesome site. I think it allows many of us struggling w/skin issues and other idiosyncrasies (e.g. nail biting & skin picking!) a place to feel a sense of community and get solutions to our problems which is wonderful... in addition to the products you sell and recommend (some of which I use).
As far as the nail biting and skin picking, I like the person's idea above, but am not sure that sitting on my hands will always work for me. Just like saying I'm going to "chill" starting today sounds great, but in all likelihood will never happen, at least not for me. I think we really need some tips and crutches to get us over these habits.
I have both issues-- sometimes bite my nails and sometimes pick at my skin. I find myself doing what Katmae's sister does, and run my fingers over my face, almost looking for bad things to happen! It's awful and I am sure I make my skin worse even when it's fairly clear. And the bad thing is that I will sometimes bite my nails in order to stop touching my face (Like CelloIsLove)! I also do it a lot when I'm on my laptop and focused on something else... like now! Scary enough, I was actually following Katmae's post about consciously doing something and unconsciously picking. It's almost like you're fidgety and need something to do. I don't watch much TV, but find myself doing it watching movies.
I personally believe that some of it's nervous energy. Not sure if this will help any of you, but I read an article once about stress, saying that if you force your mind to relax and think of something else, it will help ease such problems. It advised you to take the tips of your fingers and touch them to your thumb in succession, back and forth (you can do both hands at once) and sort of meditate on something else while doing it. This is supposed to relax you a bit. When I've tried it, it has helped!
Another thing I think we could all do as we're trying this "chill out" kinda' program... it's going to sound cheesy, but I don't care: remember to love yourself. I'm pretty sure none of us want our faces and/or nails to look like crap... so stop it already! This will sound extreme, but don't further mutilate/scar your faces and/or hands... do something else. Focus on something positive. And if worse comes to worse, SIT on your hands or do something w/them... even if it's just squeezing a ball or something. I have even said to my fiance "tell me to stop if/when you see me touching my face/biting my nails!" So you can also have someone else "check" you if that works.
I agree with whomever mentioned clear finger nail polish. I don't like to use it myself, but bought a fairly harmless one from Aveda that is not super-glossy and when it's on my nails, I don't tend to bit them. The other strange thing is that typically when my nails are longer, I stop biting them. It's like once they start looking "pretty" again, I leave them alone. I think I will put some on tonight!
In summary on this long-rambling post... I believe
My triggers are:- oil on my face
- restlessness/nervous energy
- while on the laptop, watching a movie, & sometimes at work/my desk
My solutions will be (hopefully!):- relaxing more
- doing the finger pressing thing (almost like playing piano)
- nail polish
- reminding myself to LOVE ME, not scratch/pick/bite at myself!
- help from my fiance
OK, I'm starting as of right now... no more touching my face. I'll let you all know how it's going a few days from now! GOOD LUCK to the rest of you with these same goofy habits!

-Organic Gal