Glyphs are handy tools for witches to use for so many magickal purposes. Carve one into a specific colored candle, charge the glyph and the candle to a particular use and viola; you have a powerful spell candle. Add protective glyphs in Holy Water to your vehicle and home to aid in protecting them. For that matter, use glyphs on the jars you collect your Moon Waters in to enhance the magick of the waters. Use glyphs in the corners of written spells to increase their potency.
As a witch, I feel that adding glyphs, runes, and sigils to different magickal spell practices, merely adds another layer of power into the spell. So, for MJ, who requested a few more glyphs, here you go!