It doesn't take a lot of work, time, or money to transform an ordinary kitchen into a magical workplace. To begin with, there are many simple, yet effective, charms (such as a rope of garlic, a sun-catcher, or pentagram symbols) that can be placed in the kitchen for protection.

A sunny kitchen windowsill filled with pots of magical plants not only looks good, but releases magical energies into the room. Even common culinary herbs that are found in the cabinets or nearly every kitchen possess strong magical properties. For instance, basil is traditionally used for exorcism, love, protection, and purification. Parsley is used for fertility, passion, and protection. Sage is used for healing, protection, and prosperity; and thyme is used for clairvoyance, courage, and love.  I especially like to grow tarragon in the kitchen window because of it's connections with dragons not that I've ever had the best of luck with this no matter how hard I've tried. The biggest problem is that most kitchen window sills are simply too narrow to properly hold a pot.  Also the kitchen window may not get enough sun.  If you have an east or a south east window you can generally grow anything.  African violets love east windows (though mine struggle valiantly with the north exposure of my kitchen window) and finally if all else fails -- air plants will grow anywhere.

Hang a "kitchen Witch" doll for good luck.  In fact this is one thing that has been in my kitchen since 1986.  She's ugly (the quintessential hag) but she's lived in 7 kitchens so far and even when everything else has gotten broken in moves she comes through fine. 

You should also have your magical spoon.  I found a multicolored wooden spoon in a kitchen shop and I use it when I want to put positive energy into something I'm preparing. My spoon is held by another kitchen witch statue I found in an after Halloween sale. 

A well-stocked Witch's kitchen should contain herbs, essential oils, a small coffee grinder used just for grinding herbs for potions (I retired the mortar and pestle years ago -- simply too much work), and an assortment of glass bottles for decanting your potions.  I've never found the need to, shall we say keep kosher, with my cookware.  

Always stir food in a clockwise direction, and be sure to invite the Goddess and God into your new magical workplace.