tHERE'S AN EASY WAY...
There is the hard way. You can sit in front of a piece of paper and hope that your fingers are going to magically produce your ultimate and consistent signature or...look up signature generating websites. Type in your name or initials and start exploring the wonderful fonts. The best one I have found is MyLiveSignature.com, their website has 120 fonts to pick from and the best part is the fonts actually look like different types of handwriting.
There are so many fonts that seem so relevant to so many different styles of art. You just have to find the one that fits you best. You can download and print it for free and then finally start practicing.
Yes, its as simple as that.
Let me know if you've found your signature in this way. I did.
Have a beautiful day.