h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

Well it's been a good few weeks since i last accessed H2G2. You know what it's like you have all the good intentions of doing something and your subconcious finds you something else to do instead. For example for the last 3 weeks i have had a slight problem with my shower, in that it has gotten stuck on cold(ish). All i needed to sort it out was a spanner and a pair of pliers. Both these items i have in my tool cupboard at school. It seems like a simple operation doesn't it? Go to school, do your teaching, pick up tools and go home.

Unfortuantly it didn't work like that. At the end of the day my subconcious kicked in and urged me to do things like:
Put chairs on desks.
Sweep up.
sort out my felt tips in colour order and from broad to fine tip.
CLean out my desk drawers
Make a cup of tea
Sort the printers out in the computer room
Put my credit cards in order of most used
etc...

Why does the brain do this to me? If i need to do the ironing do i do it straight away? no i've got to send an important e-mail to someone first!