Feel free to check out any of my articles :)
XNA - 2D Per Pixel Collision Detection[NEW]
XNA - Custom Vertices
XNA - Drawing Text in XNA
XNA - Parallax Mapping[NEW]
XNA - Playing Audio in XNA
XNA - Rendering 2D Textures
XNA - Rotating a Sprite
XNA - Using Effect (FX) Files
XNA - Using the Mouse
XNA - Writing to Texture Surface