I learned that we should keep trying new things.....even when we think we're not capable of them. Sometimes we surprise ourselves, and it's ususally a nice surprise.
I learned that there are 24 hours in a day, and some of them should be used for sleeping.
I learned that... it's funny that the very things that attract us to a person, (whether it's a spouse or a friend) are usually the things that a few years down the road, are the very things that annoy us about them. So it's probably a good idea to look at those things closely FIRST.