There is so much to .NET it hard to know what to keep it in your brain and to know what to let go, its sometimes such an issue for me I end up replacing everyday memories with those of .NET. As soon as I can remember how to walk instead of creating generic types I will move away from this computer!
A good way of keep your brain free is to use reference cards, and even though these tend to be on the simple side we can all do with a little pointer now-and-again. The guys over at RefCardz have seen this need and produced a free core ASP.NET reference card to download now.
The only downside is you have to print it, but never mind.
More info @ http://refcardz.dzone.com/refcardz/core-aspnet