Loads of inspiration,
Verifizierter Kauf(Was ist das?)
Rezension bezieht sich auf: Sketching User Experiences: The Workbook (Taschenbuch)
This is a great book - also to use on it's own without the theory book by the same authors.
It is full of tips, which are for me a great source of inspiration when I get stuck on a certain point in a project.
I highly recommend this for anyone doing conceptual solution design.