Taking a practice test is the easy part. Reading the result is the part that determines the score, and most students look only at the total.
Why the total says so little
The same 1280 calls for two completely different programmes: 600 verbal with 680 math, or the reverse. The total hides that.
More importantly, the same total can come from two different error distributions: questions left blank for lack of time and questions answered wrongly for lack of knowledge give the same score and need different remedies.
Four things to look at
The section scores separately. Which question type lost marks in each section. Which version of the second module was served. And how many questions were left blank.
The fourth matters especially: since there is no penalty for a wrong answer, every blank is a direct loss and that is purely a pacing problem.
What the second module tells you
The Bluebook report shows which module was served. Where the harder module was served, the first module went well and work should focus on the second.
Where the easier module keeps appearing, the real work is in the first module, and however much the second is practised the upper band will not open.
Four causes of error
Every wrong answer falls into one of four: the topic was not known, the question was misread, the method was right and the arithmetic failed, or time ran out. The four call for four different remedies.
Revising topics fixes only the first. Because that distinction is not made, the scores of hard working students stand still for months.
How many tests
Once a week is enough and more usually lowers the quality of the analysis. A test that has not been analysed has produced a number and consumed a morning.
The ratio to hold is simple: the time given to analysis should be at least the time given to the test.