If you need to make notes of important things and organize them bettewn a nexus-7 tablet and other Android device or an iPad/iPhone, Evernote app can help you. Evernote is a powerful note-taking app allows you to take notes, make syncing, save webpages, capture ideas, and share.
After install Evernote on your Nexus 7, sign in, view your existing notes or choose "New note" to add a new note. Each note will add your current location automatically.
When you add a note to a task, or add pictures/audio, it will be uploaded to the Evernote server, then syncs across your multiple devices with different platforms(iOS, Mac or Windows). This feature requires to use the same account on all devices.