If you use an Apple Pencil with an iPad Pro for note taking, Apple added a feature to iOS 11 especially for you. Called Instant Notes, the feature lets you start a new note from the Lock screen immediately. It does require a one-time setup: go to Settings > Notes > Access Notes from Lock Screen, and tap any option other than Off. If you’re not sure what you want, try Always Create New Note, but feel free to test the other options later. When you want to take a note quickly, just wake the iPad Pro and touch the Lock screen with the Apple Pencil. Voila! Notes opens a new note instantly, so you can jot down your thoughts without unlocking the iPad Pro, opening Notes, and starting a new note manually.