This can be much harder done that said. This is why I don't go around seeing all different SP's. I try to find one I like and stick with. It's takes me to long to get comfortable with one just to go around switching all the time.
The funny part is, I'm the opposite in any other social situation. I remember seeing this one SP once, and we were talking after the session because she could see how nervous and shy I was. The convo really stood out because she was telling me how she couldn't believe how timid and nervous I was, based on how I looked, dressed and acted. I think performance anxiety puts so much pressure on some guys that this is why an attitude of an SP can be so important.