In the first part of this seminar we will provide an analytical derivation of the transport coefficients of the simplest momentum dissipating model in gauge/gravity where the lack of momentum conservation is realized by means of explicit graviton mass in the bulk. In the second part we will investigate the possibility of formulating Planckian bounds in different models featuring momentum dissipation. We will show that in a holographic dilaton model it is possible to formulate a bound on the sum of the charge and energy diffusion constants.