Being Interested or Interesting????
Being interested or interesting are two different aspects. If your are interested it shows that you take care about others, you give importance to someone by knowing about them, however interesting is something about you, how you portray yourself to others.

It is always good and effective to take interest in other people by knowing about their interests, their activities, their likes and dislikes or even by remembering their birthdays. It gives a good gesture to other people that at least we are valuing them. The key technique here is to translate what you hear into talking about what interests the person you’re speaking to. Listen for things that they are interested in that you know something about, and then follow that point as a train of conversation — don’t just interject your current passions into the discussion, because they might not be shared. So always be interested than be interesting.
The suggestion here was one of the most challenging ones for me to understand. In essence, Carnegie says that you should become genuinely interested in other people, which is rather challenging for most introverts to do. What I’ve found that works for me is that I try to internalize what other people are saying — does this make sense in my life? Then, I try to express what I figure out — it shows that I am taking an actual interest in what they’re saying.

If you want to build a real bond with someone else, make it clear how important that person is to you and do it in a way that the sincerity of the feeling comes across. I find a great way to do this is actually by connecting two people I know together — I introduce them to each other with a compliment to both of them, especially if I know something that they’ll have a mutual interest in.
A Simple Way to Make a Good First Impression, all you have to do is smile, but it’s harder than it sounds. I generally find success by greeting people in a positive fashion while imagining things that make me happy — it makes it much easier to bring forth a smile. This smile makes other people feel comfortable and made them friendly towards me.

An other foremost thing to keep always in mind is remembering other people’s name. It gives a good intuition to them and make them more familiar. I find a great way to do this is actually by connecting two people I know together — I introduce them to each other with a compliment to both of them, especially if I know something that they’ll have a mutual interest in.
Carnegie says the best way to be seen as being a good conversationalist is to genuinely listen to others. I’ve always found this part to be easy — it’s the speaking part that I find challenging.
By following these rules we will be able for sure to improve our personality. These will help me in order to attain good PR and communication skills because being humble is being successful.
MY EXPERIENCE
My experience for interested challenge remain very good and amazing. I asked everybody about their interest, their current routine their hobbies, their activities during the day etc. Surprisingly everybody was so surprised that I am asking about them. I used to be so social a few years back, but with the passage of time due to several commitments I used to remain very busy. Sometimes I don’t even remember to wish birthdays in my circle. Most of the times I don’t have time for hangouts or meetups planned by other friends. In this situation when i called them or text them for knowing about them they were very surprised. However it is always good to have some time for others. It will give you immense pleasure for sure.