The Wannier90 user guide and tutorial are both available in the 'doc' directory of the current distribution.
They are also available for download here:
User guide v2.0.1: [PDF]
Tutorial v2.0.1: [PDF]
Wannier90 has been presented at numerous tutorials. Slides and tutorial notes are availible from the following meetings
Hands-on Tutorial on Electronic Structure Computations - ITCP 2013
Giovanni Pizzi gave a tutorial on transport with Wannier90. The lecture slides and tutorial notes can be found on the workshop website http://indico.ictp.it/event/a12255/.
QE workshop - Shanghai 2013
Giovanni Borghi and Nicola Marzari gave a series of talks and tutorials on the thoery and use of Wannier90. Files are availible on the QE website.
Theory and Practical Use of Quantum ESPRESSO - Cork 2010
Jonathan Yates and Nicola Marzari gave a series of talks and tutorials on the thoery and use of Wannier90. Files are availible from the ICHEC website.
NSF summer school on materials modeling from first-principles
In July 2009 a two-week school on Quantum ESPRESSO and Wannier90 was held at the University of California, Santa Barbara.
The lectures' videos, slides, and tutorials include presentations on maximally localized Wannier functions and an introduction to Wannier90 (Nicola Marzari and Nicolas Poilvert) can be found here.
CECAM/Psi-k Tutorial on Wannier90, Lyon, France, 26 June 2007
In June 2007 a one day tutorial on PWSCF and Wannier90 was held at CECAM in Lyon.
Introduction to Wannier90 (by Jonathan Yates) [PDF]
Guide to the tutorial examples [PDF]
Tutorial examples [gzipped-tar] (1.5Mb)