I think it's a wrong kind of goal (or at least wrongly-worded). Trying to consume all interesting content will leave you with no time to use acquired knowledge, and overloaded mind won't be able to produce anything on top of it. Also, as other commenters said the amount of information constantly grows disproportinally faster than you can read.

That said if you want to increase your ability to get more X-related data through your brain, you have to reduce consumption of non-X-related data - usually the first candidates to sequester are social platforms, and news websites.