Instead of reading trace messages in a file, get them in a WPF app real-time via WCF.

Read and write for app.config or web.config files with two simple, tested functions

Instead of copying and pasting the same if(InvokeRequired) logic in every multithreaded function, use attributes to make code cleaner, its centralize logic and make it self documenting.

Have a large code tree? Wondering which projects refer to which other ones? Manually run this console app, schedule it to run nightly or after each build.

An introduction to using Rhino ETL to avoid dealing with designers such as the ones in DTS/SSIS job creation.

Dictionary objects take a single key as a look up key. This class simplifies using a Dictionary when you have multiple keys, such as two strings and an int, etc.

Execute actions while making the form wait and still be responsive to other tasks.

One TDD mantra is that there should be only one "assert" per test. Here is a finance/trading example where that doesn't work very well.