We present the mini-proceedings of the workshops Hadronic contributions to the muon anomalous magnetic moment: strategies for improvements of the accuracy of the theoretical prediction and $(g-2)_{mu}$: Quo vadis?, both held in Mainz from April 1$^{r
m rst}$ to 5$^{rm th}$ and from April 7$^{rm th}$ to 10$^{rm th}$, 2014, respectively.
