Block your nose and breath out,
Here's a link to ehow. It'll tell you ways to pop your ears. (: Good luck!
try yawning, it usually does the trick
You can't its like popping a ballon or bubble, you'll just have to wait. Try using a qtip to clean them out
Q-tip.. or hold your nose and breath out
sometimes gum but not alwys thats usually when in airplane, also moving your jaw around can help