Some things you should do are Know the format used for the PSAT Test: One great way to prepare for any exam is to know the type of material covered and the format in which the questions are presented. Another Thing to do is
The Critical Reading sections of the PSAT, and after that The Writing section of the PSAT. There are a ton of other things. All I did was look up some tips to do for the PSAT test. It came up with a lot of options. Anyway, hope that helps