Can I afford it?
Completely replacing a kitchen can be a bottomless pit financially. You need to set a budget and do your best to stick to it. You may find that structurally, your kitchen cabinets are in good shape and you can give you kitchen a make-over simply by replacing cabinet doors, worktops and tiling. This can represent substantial savings.
How do I use my kitchen?
Think of the ways in which you use your current kitchen, is it a family space with a table, would a breakfast bar be suitable, do you need plenty of cupboard space, is a wine fridge a good idea. How often do you entertain, do you hate washing up? Think about how your new kitchen will fit into your lifestyle or even change it and try to incorporate these ideas into your new design.