These maybe obvious to some but I haven't seen them written down anywhere.
1. Get your Vanguard rep rank up so it's just a little away from being upgraded. Then have a few bounties to return straight away. This means you will level up your Vanguard and be able to purchase something right away. Perfect if you've been waiting for that last armour piece, or you want a new weapon. If you have multiple characters, even better. Get them all ready to upgrade their rep.
2. Don't forget about the Nightfall/Weekly! With all the new content it might be put to one side. Get it out of the way first! By my reckoning it should be Valus on Mars, which is a doddle to cheese. Do it first! You will get a shot at a new exotic, and a big amount of experience points which will get you closer to another Vanguard commendation. Also getting the weekly out of the way will give you a special coin boost just in case Xur goes crazy in his first week and gives you a bunch of great exotic upgrade choices, and new weapons/armour.
3. Do the story and strike before you enter the Raid. This one is just a personal preference, so do what you want really. If Bungie really have taken our criticisms seriously, the story missions should be a lot bigger on the narrative side of things. I want to know more about Rasputin, and everything else the Hive are up to before going to see Crota. The drops from these missions might help you along the way. For me, if you're not going to try and get the Raid done as a World's First, give yourself time to soak up all the other content (Eris Bounties as well) before diving into the Raid.
Anyone have anything else I missed, feel free to jump in.