Best way to get equip with top notch and fail proof quant skills

I have bought the gmat club tests an year back. Initially, the hardest questions(most of them are) threw me off. But eventually, my accuracy improved after couple of months(I gave 2 tests a day and completed the set twice). My average score in quant was 45 in gmat club tests. I ended up scoring 48Q in the actual test. For anyone , who aims for 49+ in quant , this test series is of a great help. Usually, you can expect at least a 3 points more in the actual test than the average score in gmat club tests. Also, the breadth of topics and range of concepts covered make the test series one of most comprehensive and under rated amour for quant.