Jrs87 posted a nice article few days ago about beliefs that make approaching easy:
inner-game-and-beliefs-that-make-approa ... 73148.html
Because inner game is not something you can dramatically change overnight, there are also some tricks:
-Give your wing 20$, which he will give you back, after you approach a set (if you don't approach on whole sarge, he keeps them). You can also give him more money or like 100$ and he gives you back 20$ for each approach or whatever you like.
-Do things that are out of your comfort zone, to make it bigger. If you can't approach anything, then first ask some man for time. Then ask some women for time. Then maybe ask for location and try to chat a bit. Have fun with hired guns. Then you can ask for opinion on something (wait... that is opening already!).