Mine are now 22, 18 and 16, and i have found the teenage years the best out of all the stages of parenting.
My biggest advice is take interest in their interests. My eldest would talk to me about BMX, scooters and skateboards for hours, id watch his videos of stunts and ask questions, support his grungey style and long hair, listen to his music recommendations even though it couldnt be further from my own tastes. My other 2 are gamers, id ask about the games, what they are doing, what games are coming out, ask about other games etc. My youngest id go to concerts of music she loves, listen with her, discuss news and upcoming albums. id talk about heir clothing, school, listen to playground gossips and fall outs etc.
Allow them not to be involved. On holiday my middle son had a show he was obsessed with coming out, he chose to spend a full day sat on the terrace watching his show. Not how i would spend a day on holiday, but he was entitled to that choice. Always offer them to attend, but if they dont want to, dont make a big deal out of it, they have their own mind and simple acts of respect to their choices go along way. My eldest didnt come ona holiday at 17 as there was a skating event the same week, it wasnt an issue, my mum fed and kept an eye on him.
Give them responsibilities. I stopped washing uniforms for them at highschool age, if they want clean clothes for school, its on them. One night a week they had to cook, even something as simple as pasta and pesto they can manage. They have to contribute to the household, i found rotating it worked best, one cooks, one washes up, one has a night off worked really well.
Lastly, apologise when you are wrong. There are times the aggrevate me and i snap and shout, but afterwards i always apoligise and explain what it was that happened that annoyed me. Again, its just showing them respect, and if they see you taking responsibility when you are wrong, they will too.
Ive found teens so rewarding, we can have intelligent balanced conversations, where are views may differ, but they listen to my opinion and why its different. They are fun, we can laugh, they do want to spend time with me because its their choice, and most of teh time come with me if i offer them a trip out somewhere. Teenagers are for the most part, amazing, my kids and their friends are all wonderful people i enjoy spending time with.