Pushka
If you pick up an 'Ikea Kitchens' catalogue (separate to their main catalogue), at the back there is a 2-page fold-out, marked out in squares (1:20 scale), and little pop-out kitchen cupboard /stove/fridge/etc cut-outs (same scale). Just measure out your kitchen, mark the measurements on the large squared plan (marking in doors, windows, etc), and then you can have fun 'putting the cupboards in place' - just keep moving them around until you find a design that works and one that you like. Simple, but have found it to be very effective! Have fun!!
Cheers
LynnH