I have several ways. First, I'm always looking for a way to use the ready-made options in a graphic editing program. Sometimes pressing one button is much more beneficial in terms of saving time than creating the same effect with several tools in the program. Plus, I use the free sample mockups on this site https://www.ls.graphics/free-mockups a lot. It really helps me a lot, besides, using these mockups, I reduce the likelihood of error in size or unrealism of some object. Try these two methods and you will find that you are really saving your time.