It really depends on what you like. Go to the tags page and click a tag. I'll choose drugs because....I love drugs? Anyways. If you look down the list you can see that minimum_wage seems to post a lot of content, so that would be a good choice to follow. Rinse and repeat. As you go on you get a feel for the people who's content you read and content you don't. Another great way to judge is to go into your settings and set "share-counts:" to yes. Now when you hover over a name you can see how many things you've shared by that person. If you're following someone and that number is zero, then it might be a good idea to unfollow them. If you don't follow someone and that number is 10, it would probably be a good idea to follow them. As you build your feed, you can always check out the global posts at the top and discover new stuff. Hubski gives you a myriad of ways to discover and read new content.