For this ritual you need a clear crystal, which has a hole (quartz is best, but well grinded glass will also do). Attach crystal about half-meter length ribbon or to a strong string.
Clear crystal with warm soap water. In addition to this you need a spiritual cleansing: Hold stone under running water and visualize all inpurities leaving from it.
Call for elements, goddess and god to help you like you do in other rituals. Hold crystal in the sun light. See in your mind how the rays of sun fill the crystal with light and energy.
When you feel like the crystal has been “charged”, hang it into window to place where sun rays hit it. In the end, thank the elements, goddess and god for their help.
Whenever you need energy from the sun, take crystal from the window and hang in from the chain to your neck or otherwise keep it with you.