Take practice tests in similar conditions to what the actual LSAT will be like:
Take practice LSATs at the time of day of the actual LSAT (around 9:00 AM);
Take practice LSATs at place where there are some mild distractions (just like the actual LSAT);
Take practice LSATs with a scantron and the timepiece you plan on using on the actual LSAT (it needs to be an analog watch – we recommend the “LSAT Watch”);
Take each section on without a break and without looking up answers and without long breaks between.