This lecture will cover some of the popular and/or recent MRS localization schemes, including PRESS, STEAM, semi-LASER, LASER, STRESS, MEGA-PRESS and SPECIAL. We will outline the reasons for preferring one module over another. In particular, we will pay special attention to the effect of different modules on coupled resonances - such as those of glutamate, glutamine, GABA, glutathione and lactate - and discuss advantages and disadvantages of each module in detecting each type of metabolite.