You can make your time table. so, that you can complete your syllabus and you get time for revision. You can add all the topics including your boards and MHT CET exam in your time-table. Focus on important topics. Give important to the topics first which carries more weight-age. You have less time so, you can make you daily and weekly targets.

According, to the new changes in MHT CET 11th class carries 20% weightage and 12th class carries 80% weightage. There is no negative marking in the exam and difficulty level is par with JEE Main. So, you should prepare accordingly.

Best books for your preparation is your text book. Complete them first and after that you can go for other recommended books. MTG, Marvel, Pradnya and Disha books are good which you can refer.

Practice is very important to score good marks in your exam. Solve as many as mock test series to analyze your preparation level and to know your strength and weakness. To increase your speed you can solve timing test and MCQs. Do revise your whole syllabus before the exam. You should prepare you own notes it will help you at the time of revision. You can also make your flashcards.

Good Luck!!