Research the history of Celtic designs. This may seem obvious but it's crucial to know what Celtic designs look like and how they function. Look at images on the Internet, at sites like Aon Celtic Art, Celtic Art Studio and Photobucket. Visit local museums and art galleries that celebrate Celtic and Medieval art. Contact a Medieval society for information and imagery, if possible.
Study tattoo galleries online. Websites such as Celtic Tattoo and Tattoo Designs provide images and valuable tips about tattoo creation. Research the ways to approach Celtic designs and the places on the body where they look the best.
Visit tattoo shops in your community and view tattoo designs (known as flash art). Most tattoo parlors will have samples, flash designs and artists’ portfolios. Talk to tattooists. Decide what works for you and what does not.
Enjoy the creative process. Celtic designs can be complicated but that does not mean they can't be playful and fun.
Start drawing. A deliberate brainstorming session will yield results.