Rather than asking such a vague, generic, unhelpful question, ask yourself whether the knowledge you're obtaining from the information you digest (see brd's com

Rather than asking such a vague, generic, unhelpful question, ask yourself whether the knowledge you're obtaining from the information you digest (see brd's comment about knowledge vs information) will: 1) Give you more prediction power, and 2) Allow you to later act on this prediction power to take a different action that will have a more beneficial outcome than the action you would have taken without that knowledge. Taking better actions is the whole point of knowledge. In that respect, some of it (e.g. specific knowledge of current politics for someone who is not an activist and doesn't even vote) can be beyond utterly useless or actively harmful. On the flipside, some (e.g. knowing there is a tiger behind the first door, and no danger behind the second) have huge visible effects (taking the second door, improving survival chances from 50% with zero knowledge to 100% with knowledge of the tiger).