I kind of have the same issue, I think its caused a lot by depression...not sure though. But a lot of times I know what i need to get done but then I just think about doing it and if there is something else that needs to be done I get stuck on deciding which to do first.......if there's more then two things to do then its really difficult. Or a lot of times it seems like the thought to take a shower or something useful like that enters my mind and then for whatever reason the thought never becomes an action and I forget about it untill its too late. It can be kind of annoying. Or if I don't have a 'where the hell is my mind' moment I lack motivation because I'm so depressed I feel like I'm in physical pain so its hard to do much of anything on the days where my depression is out of control.