Kathy Sierra has a more than timely post on "The Myth of Keeping Up". It's just not possible to keep up with the explosion of materials on pedagogy, research, and technology. Here are her categories for managing one's reading and "keeping up":

• Find the best aggregators
• Get summaries
• Cut the redundancy!
• Unsubscribe to as many things as possible
• Recognize that gossip and celebrity entertainment are black holes
• Pick the categories you want for a balanced perspective, and include some from OUTSIDE your main field of interest
• Be a LOT more realistic about what you're likely to get to, and throw the rest out.
• In any thing you need to learn, find a person who can tell you what is:
• Need to know
• Should know
• Nice to know
• Edge case, only if it applies to you specifically
• Useless