Building Layered Web Applications with Microsoft ASP.NET 2.0

Written by: Imar Spaanjaars

Part one deals with the design of the application: what business objects do you need to fulfill the requirements of the application? What should these objects be capable of and how do they look? How do these business objects interact with other parts of the system?

Part two (2) then shows you how to implement the code for these objects, while

Part three (3) deals with using the business objects in a real-world web application.

Building Layered Web Applications with Microsoft ASP.NET 2.0 - Part 1
Building Layered Web Applications with Microsoft ASP.NET 2.0 - Part 2
Building Layered Web Applications with Microsoft ASP.NET 2.0 - Part 3

Data Modeling

Data Modeling for the Database Developer, Designer & Admin

SQL Performance Optimization

Good Video for SQL Developers.
Also have a look at the Quest White Papers.