To diversify a physics degree with engineering courses, focus on areas that align with future career goals or interests. Recommended courses include circuits, analog/digital electronics, control systems, fluid mechanics, and engineering-style probability and statistics. These subjects enhance practical skills and understanding of system design, which physics majors often lack compared to engineering students. It's important to consider specific engineering fields of interest, as not all courses will be relevant to every path, such as aerospace design versus electronics. Additionally, programming skills are essential for most physics-related careers, particularly in experimental physics, making it advisable to take programming courses as well. Overall, a strategic selection of engineering electives can provide a competitive edge in the job market or when pursuing graduate studies.