Sometimes when i'm in really bad hangover, and i'm going out to get some food (which is usually a mistake for my mental health being considered) and there's that super hot girl ordering at the line, i have to do these little exercises to even be able to watch her. It's like your dying already and feel extra horny in these situations, so you can't miss that opportunity even tho your mentally and physically dying, those feelings are fighting each others: "i shouldn't even think about her at this stage, should get my food and leave as fast as i can!" and "damn shes hot, i would do her right here right now!" Well, i came up in a solution:

*First, i have to block my horniness (you don't have to do this if it's not necessary, but i do it because we all know women see these kinds of stuffs pretty pervert in fastfood lines when they feel it from you)
- I empty my mind and start taking my colossal sexual energy - mojo - out of my body, think it as it starts to move down through your feet and then through the floor, like back to earth, visualize it like its red fog or something that pleases you and works for you.
*Then the anxiety part
-"i cannot do it i cannot do it i cannot do it" voice in your head, you have to make it sound more pleasant. As you tune your inner voice much more pleasant, suddenly you realize it says "you can do it you can do it you can do it!" It boosts you and give you lot of good energy and confidence!
*3 - second rule
-Stop rapidly thinking! Don't think anything, clear your mind totally, pull deep breath 2-3 times and approach! It happens so fast you don't even realize until few seconds later that you're even talking to her! You can use some canned material, because when learned properly those come naturally without thinking

Then just play the game as you will!

Other tactics (mostly NLP stuff):
*Vision the problem you have as a show on TV inside your head. Then, start making that picture more and more whiter, like your fucking up its contrast
*Then start making that TV more and more smaller, until it's a size of a grain of sand
*Then, blow that grain of sand out of your head and mind
*Repeat few times until it's really gone from your system
*Start thinking the most happiest thought you ever had! What made you laugh, proud, generally made you feel extremely happy
*Think of this though until you feel it's energy running trough your whole body, think it even farther until there is no other feeling inside and outside you

--> go get'em

I like how you said "help approach anxiety." There are topics on this forum that talk about "permanently destroying approach anxiety" and I believe that while that makes for a catchy e-book title or forum post header, saying "you can end approach anxiety for good" does a dis-service to guys who actually get into the field and realize that after Day 100 they still have it; it's hardwired; most people can't eliminate it; but rather learn to recognize it and proceed despite of it.
It's like jumping in the pool

Yep, what i have noticed is no matter what kind of person you are or how steal-iron nerves you have, people still constantly feel, you can't feel happy 24/7 or etc. Think about like this: Mike Tyson is going in the ring. He's the fucking champ, and he knows it! But i would bet all my money for it that he feels those butterflys still in hes stomach, what if this one is better? What if this one beats the shit out of me?

Another what i've noticed by talking to a lot of guys is that what if she has a boyfriend and she finds out, no matter how undercover i work? That usually comes with a feeling you could get beat up by him and hes friends, especially when alcohol is involve, and that really holds them back. I have told those little tricks how not to think about it, and actually have beat their feelings and did go for it. It just you have to eliminate those feelings in there, in the situation; i don't think it's very useful if you do it home, i don't think it will last in clubs until you really put multiple days of effort in it