Perform the Cabbalistic Cross as follows: 

Stand feet together facing east, arms at your sides. Visualize yourself expanding upward and outward into space until the Earth can be seen like sphere aout afoot in diameter beneath your feet.

Raise your right arm above your head, then draw it down to your forehead. Visualize a beam of brilliant white light coming down from infinitely far above your to point just above the top of your head where if forms a sphere of white light, also about a foot across. Vibrate the word ATEH (Aah-teh).

Inhale and bring your hand down and touch the middle of the solar plexus and visualize a shaft of light descending through you to the sphere at your feet. Vibrate the word MALKUTH (Mahl-kooth) 

Inhale and bring your arm to your right shoulder. Visualize a beam of light extending out from the verical beam to form one arm of a cross. Just beyond your shoulder it forms another sphere, this one bright red light. Vibrate Ve-Geburah (pronounced "veh geh-boo-rah) 

Move your hand across your chest to your left shoulder and visualize the light coming out to form the other ray of the cross. Visualize a bright blue sphere just beyond your shoulder. Vibrate the word Ve-Gedulah ("veh geh-dyoo-lah") . 

Fold your arms across your chest, crossing at the wrists, right over left. Visualize the entire cross shining with light. Vibrate Le-Olam, Amen ("leh oh-lahm, ah-men).

Notes: Vibration of words is a little odd. It's sort of half spoken, half chanting. You have to find a tone that produces a vibrating or humming feeling in your body. It doesn't have to be loud. I figured this out by randomlying experimenting with vowel sounds like aaaaaaaaaaah and ooooooooooh, playing with the tone, the position of your tongue, the shape of your mouth and so on until I got a tone that made a slight humming feeling in my body. I also listened to a few people on youtube doing it, which might be super helpful since what works for me is probably lower than the register of your voice. I'd use a private browsing window for that.