Know your strengths and weaknesses: Are numerical subjects your strangth or core subjects your allies? If you have already taken FE exam and failed, you must have got a daignostic report. Please go through this article to know more about how to read a diagnostic report. Are you weak is math related courses (Math, Probability and Statistics, Economics) or are you not upto the mark in your core discipline courses?

Be smart and strategic: Assess the time you have and prioritize your actions. Start with the actions that will bring the most benefits.

Always stay energetic: Preparing for FE will drain your energy. It will take your available time and your work responsibilities, family relationships will suffer. There is a chance that your health will deteriorate and you will feel depressed occassionally. But remind yourself that success is worth it.

Hope for the best but prepare for the worst: Remove negative thoughts but be ready to face the consequences of a negative outcome with positive mental attitude.

Workout, meditate and spend some time with yourself if possible.

Be in a group of like minded people: Surround yourself with people who aspire to be the best. Find friends at your workplace who are in similar situation. Join online groups which are specifically dedicated to study for FE Exam. Attend Engg.tv revision lectures every Saturday. As questions, get answers, help others. Know that youare not alone. Youare not the first person to go though this and you are not the last person to face this. Life continues. Evolve, Adapt. Succeed.