Striving for excellence, and ideally achieving it, in areas of life that matter (family, work, etc) is important. In contrast, attaining perfection is typically neither necessary nor practical. The same is true on standardized tests. For example, the difference between a 790 and 800 on the Literature SAT subject test is minuscule and inconsequential. A 790 on the Literature SAT subject test puts students in the 98th percentile of test takers, and an 800 puts students in the 99th percentile. If a student were to score a 790 on the Literature SAT subject test, I would never advise that they re-take the test; their time would be better spent doing almost anything else.
For those intending to go to law school, the beginning of the year is a great time to start LSAT prep. Generally, law school applications should be submitted by mid-November in order start law school the following fall. Test takers and future applicants should plan their prep and application submissions with mid-November as the finish line and work backwards. Starting LSAT prep toward the beginning of the year will allow test takers enough time to prep, take the LSAT, and retake the LSAT before that mid-November time frame.