Create Your own SmartPart

http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2008/07/30/how-to-build-your-own-smartpart-control.aspx

Video Tutorials

http://freevideolectures.com/Course/2516/Introduction-to-Computer-Science-I/2

SharePoint resources

http://jopx.blogspot.com/2009/03/sharepoint-unit-testing.html
http://www.learningsharepoint.com/

http://programmingsharepoint.blogspot.com/
http://mysharepointwork.blogspot.com/

Application Development

Build and end to end ASP.NET MVC Application

http://www.weirdlover.com/2010/05/29/the-big-boy-mvc-series-building-an-asp-net-mvc-web-application-all-by-yourself-part-1/