For each mathematical subject on the undergraduate level there are many textbooks, often with quite different approaches to the subject. Some are just concise and rigorous, some focus on examples, some on the historical development of the subject, some on intuitive pictures, and so on. When designing a course, one of course wants to find the most illuminating explanations, examples, and pictures that help students to learn the subject. But how does one go about browsing through this vast literature to find them?
Of course one can't read each text book, the time just isn't there. How much should one focus on exploring the literature for better explanations? Or should one focus on coming up with explanations and examples by oneself? (Maybe if one comes up with the explanations oneself rather than taking them from a text book one can convey them to the students more easily?)
I admit this question is very much opion-based, but I would be interested if there's something like a 'consensus' among math educators.