Two things: - When you do actual product design, a lot of it is basically copy&paste from example circuits in data sheets. Over time you learn to recognise comm

Two things: - When you do actual product design, a lot of it is basically copy&paste from example circuits in data sheets. Over time you learn to recognise common patterns. The "trick for young players" though is that often the data sheet examples omit "obvious" aspects that should be added for real-life applications. - You can find schematics of real-life products in "service manuals", though they are much less common now than in the past. A really good exercise would be to take the schematics of a consumer product like an iPhone (they can be found... either copied from service manuals or reverse engineered), and look up the data sheet for each component (sometimes it will be a similar component from the same manufacturer as Apple will be assigned custom part numbers), and try to understand why it was used in the product the way it is shown on the schematic, based on the information in the data sheet.