iphone rules

What apps come on the iPhone by default?

are you using the Things app on a mac?

to-do lists suck. Look up 'Getting Things Done' and be rid of to-dos

then you'll want an iPhone app like OmniFocus to track next actions and context

AshDonaldson I agree that OmniFocus is the best choice for GTD followers, but not sure it's that useful without the desktop app.