I think for introverts and ambiverts the generic advice we hear from time to time, "be true to yourself" is actually very good advice.
The other piece of advice I'm sure that you have heard to is "don't try to be someone that you are not."
Lets have a look at the first one. Be true to yourself. Take some time to figure yourself out. There are many people out there who just go through the motions on a daily basis and they are in misery and I would hazard a guess that it is because they are doing something that doesn't work in with their natural talents.
So, figure out your strengths and what you bring to the table and try to improve on them and if possible delegate your weaknesses. You will be, as my friend says "kicking ass" in no time at all.
The second piece of advice is connected to the first piece of advice in that you shouldn't try to be someone that you are not. However, I am going to contradict everything that I have said in that sometimes you are going to have to fake it. You are going to have to come out of your shell so to speak and be the big, loud extrovert just to get your point across. I know that that is not being true to yourself but in 2016 I think that sometimes you have to do it. You have to get yourself out there because you may be in danger of being left behind.
Be true to yourself but remember sometimes you are going to have to play a character. It might be exhausting but remember that it is just temporary unless you want to make it more permanent and that is a different story altogether.