Anyone recognise this scenario and have any suggestions as to how to deal with it? Our 10 year old daughter is getting into a way of just "living in the current moment", the best way I can think to describe it, which is starting to cause home and school difficulties. Meaning, inability to think ahead about planning for the next day (e.g. school), and instant forgetting of what has gone before (e.g. tidying up). Just doing whatever she is doing, and then moving on to something else.
Our house becomes an endless trail of unfinished drinks, left-on computers and TVs, discarded clothes and shoes, crisp packets, dumped schoolbags, as she moves on from one activity to the next. Her bedroom is an utter tip and only constant nagging with threat of the bin bag over the weekend generated any improvement. Requests to tidy up, put away, etc. are met with "in a minute" and other such responses. The flip side, (forward thinking), is that P.E. kit for school is not taken in so P.E. lessons are missed, homework not finished and homework books not presented for marking. School clothes are often not sent down for washing and finding school clothes for Mondays is often left right to a last minute scrabble through the washing pile. And so on and so forth.
Don't tell me, this is probably normal 10 year old behaviour! 
But, any ideas how we can progress from the current situation of trying to stay on her case 24/7 and using threats and nags for all of the above situations and more, to keep her in line as best we can (which is hard work, gets antagonistic and is very wearing on everyone), to a more pleasant scenario where she actually thinks about these things for herself without nagging or prompting and she can therefore be praised for doing so?