I guess it depends on what your channel is all about. I used to have a music channel, so it was easy to just upload the latest song. But now that I'm thinking about making more interesting content it has changed. I've tried to think about stuff that might do well, or get me more views or subscribers, but it really comes down to doing stuff that you are passionate about. It's hard to make content when you don't care. You have to want to do it, because, if we're being honest, there is a good chance most of us are not going to live up to the expectations we have for our channels. I have abandoned a few already because it wasn't working. My channel now is a labor of love with my best friend, who happens to be my twin brother. We come up with the ideas and ask for input from our viewers.