To make ones own ritual tools is ALWAYS best, to construct ones own ritual tools imbues the tool with your own personal energies and spirit. Feel free to mark ritual tools with symbols, letters or names that are personal to you
To find ones own tools, items, and construction elements in nature is also suggested (such as gems, stones, wood, leafs, vines, twigs, sprigs, oils, sap, herbs, bark, etc. etc. etc.
Take the time to learn and know what each tool is used for and represents
Mastery of Elements is just that: to MASTER the elements, to know them, to revere and respect them, to use the magick within them as well as the magick within the user
THE best tool one has is self. You are your own best tool so allow yourself to know yourself for mastery of ones own spirit is the most important tool one can use =)