This document discusses important considerations for choosing appropriate buffers for biochemical reactions. Effective buffers should not pass through biological membranes, minimally affect salt concentrations or be affected by changes in temperature or concentration. An optimal buffer will have a pKa between 6-8 to match most biochemical experiments, be water-soluble, and prepared at the correct temperature and concentration to avoid pH shifts. Choosing the right buffer is key to avoiding artifacts and ensuring experimental success.