Take some time every day to study math. Math - especially calculus - plays a major role in electronic engineering. Electronic engineers need to analyze electrical signals in their work, and they do so by applying the methods they learn in calculus. If you are unfamiliar with high-level math, you may have difficulties designing and processing signals.
Find some books on mathematical logic and familiarize yourself with the subject. Logic may seem like something only mathematicians and philosophers spend time studying. However, electronic engineering makes heavy use of logic. Logic is especially important in the design and debugging of hardware and software.
Be curious about how electronic devices work. Whenever you interact with an electronic device, ask yourself how it uses electricity to meet its purpose. Curiosity may not be essential in passing your "introduction to electronic engineering" course, but it is a trait that helps separate the amateur electronic engineer from the budding inventor. One key technique recommended by software developer and electronic engineering Ph.D. student Ji-Shien Lu is that whenever you come across an electronic device, think of how you would have created it. By constantly thinking of the inner workings of the devices around you, you can quickly grasp the bigger picture of electronic engineering.
Use your imagination. For many students of electronic engineering, dealing with mathematical equations and circuit diagrams from day to day can become monotonous. Imagine being the CEO of a large electronics company and ask yourself what you would like to present to the world next year. Putting yourself in these kinds of scenarios can help you stay motivated and get your mind running in the direction of innovation.