If you are asking for 10th boards preparation, be clear with the subjects and syllabus coming in the exam.

Have the NCERT/school books for all the subjects. Thoroughly read them to understand the basics.

The important part is not 'what you plan but how you execute' Planning if executed in a correct manner can get you results.

In subjects like biology give emphasis on diagrams, in physics your fundamentals should be quite clear and same goes with maths. You should make a separate register for maths formulas and prepare smartly. Under social studies, you should know the important topics and main marks fetching topics and accordingly you can prepare. In English, your writing and grammar matters. Practice workbooks, read novels and newspapers. This will help you overall.

Its time to prepare smartly with hard work.

Good Luck.