there is a plethora of get things done applications that you can choose from on the iTunes iOS App Store, with the sister applications that you can sync up to available in the Mac App Store. If you haven’t read the books yet by David Allen the GTD Guru, Then you might find it a little difficult choosing from all of those apps and services that are available. Here are a few applications that you might have a look at and see if they will suit your purpose.
A good simple application to use could be Wunderlist, or you might like something a bit more like Organise HD.If you have a pile of money burning a hole in your pocket then you could buy the Omni focus for iPad and also the Omni focus for Mac OS X. Many people do swear by the efficacy of Omni focus.