Recently, we started a wiki, that in future will replace the online manual completely.
In 2003 we organized a VASP workshop. The lecture notes and examples from the handson sessions are highly recommended as place to start if you are a beginner and might also be useful if you are not.
|Introduction to Computational Materials|
|Introduction to DFT|
|Hands-on Session 1, Example Files|
|Sampling the Brillouin zone|
|Hands-on Session 2, Example Files|
|Ionic relaxation methods|
|Electronic relaxation methods|
|Hands-on Session 3, Example Files|
|Accuracy and Validation of results|
|Pseudopotential Data Base|
|DFT in depth|
|Unpaired electrons in DFT|
|Hands-on Session 4, Example Files|
More recently the CSC-IT Center for Science Ltd. in Espoo, Finland, organized two VASP workshops (2006/2009). The lecture notes of those might interest you as well.
|Basics, PAW, DFT, Hybrid functionals|
|Linear response, Dielectric properties, GW|