Lost count of how many to-do list and productivity apps and methods i have tried over the years in many jobs, roles, countries. Wunderlist was the only one that stayed installed on multiple devices for more than a few days, Trello seems to work for groups, and now looking at Producteev to take it for a spin on a project. But alas it seems my brain is not suited for this 21st centruy style of organising. If i write it down with a pen, on some paper, then it goes in my brain and i remember it as something i have learnt/read/planned. The best to-do list holder is my brain but seems the only reliable way to get something 'filed' is to write it down. i find my to-do items across work and all aspects of my life is something that floats around in my conciousness permanently (usually with a guilty tinge for all the things i have procrastinated over, and an acute awareness that 24 hours is far too few in a day).