1. Understand the basics:
- Familiarize yourself with the basic properties of complex numbers, including their representation in the form a + bi, where 'a' and 'b' are real numbers, and 'i' is the imaginary unit (√-1).
- Understand the operations involving complex numbers, such as addition, subtraction, multiplication, and division.

2. Practice simplifying complex expressions:
- Simplify complex expressions by using the properties of complex numbers, such as the distributive property and the fact that i^2 = -1.
- Practice simplifying expressions that involve complex conjugates, which are of the form a + bi and a - bi.

3. Solve equations involving complex numbers:
- Solve quadratic equations with complex roots by using the quadratic formula and simplifying the expression under the square root.
- Familiarize yourself with the concept of the discriminant and its relationship to the nature of roots.

4. Understand geometric representation:
- Visualize complex numbers as points in the complex plane, where the real part is represented on the x-axis and the imaginary part is represented on the y-axis.
- Understand the geometric interpretation of addition, subtraction, multiplication, and division of complex numbers.

5. Use De Moivre's theorem:
- Apply De Moivre's theorem to simplify the evaluation of powers and roots of complex numbers.
- Understand the polar form of complex numbers and convert between polar and rectangular forms.

6. Solve problems involving complex numbers and other topics:
- Understand how to apply complex numbers to solve problems in algebra, trigonometry, and coordinate geometry.
- Practice solving problems that involve complex numbers in combination with other topics, such as matrices and determinants.

7. Solve previous years' JEE Main questions:
- Solve previous years' JEE Main questions related to complex numbers to familiarize yourself with the type of problems that may be asked in the exam.
- Analyze the solutions and identify any patterns or common techniques used in solving complex number problems.

Remember, the key to success is regular practice and thorough understanding of the concepts related to complex numbers.