As the boards are just around the corner so I am sure that you are done with your syllabus and now revision is going on so it is advisable to focus on sample papers and previous year papers as these are considered to be the best choice to know the difficulty level of questions along with paper pattern as well and lastly subject wise mocks would be really good becuse through this you will get to know your weak and strong areas and apart from this, you will be learning time management skill as well.

Good Luck!!!