A new tutorial is available in the Yambo wiki on electron-phonon interaction. This tutorial starts from the calculation of electron-phonon matrix elements with Quantum Espresso and how to read them with Yambo. Then we explain how to calculated the effect of lattice vibration on the single particle levels, and how to use this correction to obtain finite temperature optical properties.
Finally In the last section we discuss  all the important parameters to be considered for a converged calculation.

http://www.yambo-code.org/wiki/index.php?title=Electron_Phonon_Coupling