I know the weather and our asthma has been getting quite a few of us down of late. Here is an uplifting video by a really inspirational guy called Randy Pausch who, sadly, has now passed away.
He gave this lecture to his students, someone videoed it and put the full thing up on the Internet. It got such a repsonse that he later went on the Oprah Show and did a shortened 10 minute version.
If you want to watch the full version you can find it online at Youtube and elsewhere but here is the short Oprah version.
Hope it helps,