Sticky notes are still a lifesaver, but to save your notes and ideas and access them anywhere, you should look into a service such as Evernote. It lets you create and view notes on your computer, phone, and the web. In addition to text notes, you can save photos, audio, video, and files.
The Evernote app for the Android lets you create, view, search, and organize your notes and notebooks right from your Android phone. They are synchronized with your Evernote account so you can also access the same information on your computer, other mobile devices, and from the web. You can also enable offline notebooks, so you can still access notes when you don’t have a network connection. You can add a widget to your Android desktop for quick access to the Evernote functions.