To improve in ESC-101 Introduction to Electronics, focus on mastering foundational concepts such as Kirchhoff's Law, source conversion techniques, and Thevenin theorem for circuit simplification. A strong understanding of passive components and their I/V characteristics, along with the application of superposition in linear circuits, is essential. Many students struggle with op-amps and transistors, so utilizing resources like Sedra's "Microelectronics Circuits" can provide clarity on these topics. Additionally, practicing problem-solving and exploring alternative texts like "Electronic Design" by Carpenter and Roden can enhance comprehension through real-life design examples. Engaging with these materials and seeking solutions to challenging problems will facilitate better understanding and performance in the course.