we did our kitchen about 8 months ago and the best thing I did was put drawers in everywhere instead of cupboards and shelves, even did the pantry in drawers. Amazing how much space is wasted without them.
The worst thing I think we did was getting white ceasarstone. I love it and it looks great but it stains so easily, cordial, coffee wine, you name it.. Quite upsetting when you spend $4K on it..
Ours was a big kitchen, nearly 9 meters in length and cost about $17k all up.