A great technique to help you memorize new material is to read the information out loud. Research has shown that this simple act significantly improves the memory of this material. Research has also divulged that teaching a new concept to others will also increase understanding and recall of the information.
A good tip that can help you improve your memory is to pay more attention to your surroundings and to what's being said. You can't expect to recall something you've learned if you didn't even pay close attention in the first place. Try to be alert at all times to be able to remember things later.