Wide range in PTs before August LSAT

In the last week I have scored 169 and a 180 on PT and basically nothing in between. I feel like there are environmental factors influencing the lower scores, being noticeably tired or distracted, getting used to UI changes after a break. I am just anxious going into test day when it feels like a toss up between a life changing score and one that might not even get me into my desired school. I am not reaching for a 180 on the test, just hoping to score near the average of these, but any advice on reducing the impact of environmental factors/distractions or generally increasing consistency would be greatly appreciated.