This is good advice, but I also think it's important to realize that showing a genuine interest in others is the most attractive quality--and it you're faking it to get noticed, it will backfire.

Most people are self-conscious when meeting new people--even extroverts. So if you focus on helping them feel at ease and make your goal to learn about them vs. make a great impression for your own benefit, it will have the same effect and you don't need rules to follow.

If you get caught up in playing a role or worrying about what others are thinking of you, remember that most people won't be thinking of you at all--they're wondering if they are making a good impression on you!