A lot of the focus on productivity comes from the tools we use to be productive -- which to-do app is the best, which has the most features and so on. Productivity consultant David Allen explains in this video that even if you find a great tool, none of it matters if you're not being consistent and clear about what you put into it.
Ultimately, if you get so seduced by the bells and whistles of the tools you use that you stop being clear and consistent about organising your to-dos, your next actions and the things you want to accomplish in the long run, you'll get tired of whatever tool it is and give up quickly. He explains -- as we've noted before -- that the tool or app is less important than the way you use it.
Don't be afraid to switch tools and compare technologies: just make sure you have your methodology down pat first. Most apps are loaded with options and features designed to cater to lots of different types of people, not the other way around. Find the features that work for you and stick with them, instead of trying to shoehorn your needs into all the features available.