Alright, we've been playing for a few hours. What are we supposed to be doing?
First off, talk. Constantly. To everyone. I've seen far more "good" players that can't do anything but talk a lot than smart players who don't talk a lot. Even if you don't feel like you have a lot to say, just chat idly, or discuss game philosophy, or try to find out what they're doing. It helps build relationships, it shows people you care, and you can often glean things that help you figure out how to approach people. One of the most important parts of this game is convincing people that what you want is what they want. That's only possible if you know what it is they're looking for.
Secondly, plan. You can't control everyone's moves every phase, but you should know what you want them to do. Think about the advantages to any alliance you're considering. How will this get me to a solo? What will I do if I'm stabbed? When do I want to move on, and to what? What do I want to happen elsewhere on the board? Figure out the answers to these questions and figure out how to shape the board the way you want it. That's how you win.
Again, a lot is out of your control, so you need to be adaptable, and you definitely shouldn't be spending this phase developing a singular plan and going all in on it. Talk to everyone, see what they want, see what the future might hold with them, plan three or four or fifteen solos, and decide which paths are the best when you need to. That could be early, as acting boldly is a great way to secure an alliance. Just don't commit before you know what you want or whether others want it to.
Third, have fun with it. This is a fucking game. Try something crazy. Make some friends. Strive to entertain or even outsmart your loving professors. Put effort into this game and you'll see good results.