cake rules that my mum taught me, for better or worse!:
* leave butter and eggs to sit out until they're room temp before starting
* cream butter and suger first, making sure sugar is added slowly enough to dissolve and cream properly
* then add eggs
* before you start adding flour and milk make sure everythings ready to go - it's from this stage that you have to do it quickly and get it in the oven for best results
* use self-raising flour or plain flour and lots of baking powder or cake won't rise
* alternate adding portions of flour and milk, starting with bigger portions of flour, smaller of milk, slowly changing so you finish with adding smaller portion of flour and more of milk
* don't beat on high speed when adding milk and flour, either use very slow speed or do it by hand - you're folding in more so than beating together
* get it in the pan and in the oven and then DONT open oven before the cake is at least 3/4 through the cooking time or it will sink and not rise again..