Steemit is gaining thousands of users each week, but a lot of these may take a wrong approach. They need guidance on how to succeed, i.e. not by spamming or copying content. If it's to get to millions we need to set the right expectations or it could get really messy
They also need to see stuff they are interested in to keep them here. I think apps that let you easily find and filter content you want will be really important.