Most TMS treatments still place the coil based on scalp landmarks — a pragmatic approach that has served the field well but leaves significant individual variability unaddressed. We now have better tools. Two data sources generate from EEG can tell you precisely where to aim and what to do when you get there: current source density (CSD) from qEEG and functional connectivity maps. Here's how each works, and how to combine them and where to find the precision tools needed for personalized TMS.