If you are thorough will class 12 syllabus, revise the topics of class 11 and do as many question papers as you can. It will really help in the actual exam.You can take help from careers360 personalized crash course to get some direction in the preparation. 

Best of luck. 

Dear Sharifa,

In order to prepare for NEET make sure your NCERT is completed to make your base strong and to clear all your concepts and fundamentals. 
Your syllabus is based on NCERT books only. To give edge to your preparation go through previous year papers to understand the exam pattern and level of questions. Focus on important topics you can solve MCQs related to important topics for your practice. 
You can also solve complete mock test series to understand your strength and weakness. So, you can work upon them. 

Good Luck!!