Look at your PSAT scores. Each section--critical reading, math and writing--has been scored on a scale of 20 to 80. Twenty is the lowest score possible and 80 is the highest and best score possible.
Add a zero to the end of each of your scores. A 50 would become a 500; a 38 would become a 380 and so on.
Calculate your estimated SAT score. According to Peterson's College Search, a score of 49 before the conversion, or a 490 after the conversion, is an average score for an 11th grade student in any of the sections.
Figure out your areas of weakness. Because this was simply a practice test, you now know what you need to prepare for before taking the actual SAT.