Get the most out of what you already have
Knowing the prices of your beads and components is key to setting a price for your jewelry. It's also important to know what you have - and what you need - to make sure you're keeping your costs down. You can't afford to buy the bicones you already have plenty of, or interrupt a project because you didn't realize you were out of sterling silver jump rings.
And once you've gotten your business rolling, you'll want to know exactly how many necklaces, bracelets, and other jewelry pieces you have, what you've sold to whom, and for how much.
Recording every single bead, spacer, and clasp is going to take some time and won't be fun. But once you're done, adding and subtracting items as you buy or use them is relatively easy.
It's not true that a creative person can't be organized too. You may actually find you're more creative when not surrounded by chaos. Your brain will give itself permission to play when it know it has done it chores. But even if your creativity thrives in chaos, your bottom line will not. An organized inventory system will also make tax time much less painful.
There are a number of software options to get you going, including Jewelry Designer Manager Deluxe (jewelrydesignermanager.com) or beadmanager Pro (beading-software.com). As the names suggest they're specifically for jewelry designers and will track inventory of supplies and finished pieces along with a host of other business functions. They'll also automatically price your jewelry! QuickBooks (intuit.com) is one of the many other business software programs that offers inventory-tracking options. Being a natural do-it-yourselfer, you also might want to use basic database software (like FileMaker Pro or Excel) you may already have on your computer.