I really like to think that it's not so important on how many approaches you try, just that you don't find yourself unwilling to try, and that you learn from each one. I mean if you can learn just as much from 3 approaches as you can from 15 then great, go for 3 but its what works for you (needless to say the efficacy of your evaluation skills may need to be examined).

For newbie's it can be helpful to just try as many as you can just to get past that fear of social inadequacy, and it's true it can help, but the habit isn't sustainable, you carry on like that and each social interaction is going to have less and less importance in your learning experience.

Just my opinion anyway.