Here is a awesome tutorial on creating a simple button for your next user interface in Inkscape. The author assumes that you have a basic grasp of Inkscape before using this tutorial, there are no screenshots of which buttons to press. It is simply a explanation of the workflow used to make this button.
Ever wondered how to quickly create a block arrow with inkscape? This quick tutorial shows you how!
Here is a tutorial to create a vector design in a street art / graffiti style. This tutorial does not go into much detail on each of the steps, is more of a demonstration of the workflow the artist used to create the design. Well worth a look for intermediate and advanced Inkscape users.
Here is a quick how-to outlining the process to create custom inkscape SVG filters to style text. The tutorial covers the procedure to create a filter for text with a shadow, slightly inset text and raised, super glossy text. The tutorial also has a downloadable SVG so you can open up the image in Inkscape and play with the filters yourself.