I agree with you on not liking the idea of changing your time sinks. I ran into a similar problem as your's with Reddit, and realized it was because I did not really like my self.

Somewhere along the way I realized I had not day dreamed or used my imagination for a long time because it was so easy to "read the nearest material I can lay my hands on".

To add to your advice I would suggest to try to find out who you are without outside material and to get comfortable with this self.