duh - i hate to mention a most obvious thing - you had enough presence of mind to write what you did. therefore - you have enough 'focus' to do such a thing as to write to psychcentral and spell out your problems.
so - there are other things going on that have made you lose focus. maybe you never really wanted to write things on the net - cause i thought of doing that - but most of the pieces are like fluff (how to take a proper shower, how to properly boil an egg) - that the idea of it was so mindless and therefore so stupid, i never wanted to write something like that, so i didn't.
all i can suggest is to go outside yourself. if you yourself are disorganized and feel useless and depressed - go outside yourself and do something for someone/ something else. take up THEIR challenge as your own. because your own challenge will never be enough for you - it's insufficient to keep your mind aware. the reason you have trouble remembering stuff cause there is no reason to - for yourself.
remembering for someone else might be more important to you and hopefully an answer to your dilemma.