Hello, some things that worked for me and I still do till this day; communicate, explain and follow through and be consistant. Example;
Sit down and tell her that from now on she needs to listen and do what is asked of her, if not then, (ex. tv) you can't watch your program tomorrow.
Say, "When mommy asks you to turn off the tv I'll give you a 5 minute warning, but then it's time, ok". And you let her know whether it's 5, 10 or 15. This way you let her know what's going to happen and then you make it happen. My son wants to go outside, okay...explain. Dinner is in and hour I'd like you to come in when I ask to wash your hands and get settled for dinner. 15 minutes before I yell out "15 minutes" and when I go back, time
to come in. He's in. Don't just pull them out of something, rather warn them and see if it works. My son is 11 and until this day I do that. Before bed I say, "Son you have 30 mins." When time is up I let him know it's time. That's why I say explain so they could understand, give consequences so they know what will happen if they don't listen. And the consequences need to be followed through and it may take a couple of times, but they'll get it. It's all in being consistant. As far as potty, just say, "Let's go potty so we can finish playing" or "so we can eat dinner", etc....If not, you're going to sound like a broken record repeating and repeating. And when she makes it to the potty and/or listens, "Tell her, thank for being such a good girl". Give her a hug and clap your hands.
Children need guidance, direction, but most of all praise. What do you have to lose. Try it and good luck........