Visualizations I sometimes use.
Imagine yourself standing in the long grass in your bare feet, the grass coming through your toes and feel the sensations as the wind gently blows the grass around tickling the tops of your feet. Let all the negative energies and stresses move down and away into the ground as a warm and brilliant white divine light encompasses you from above with a loving and healing light that makes your whole body glow. Relax and let the day slide away from your thoughts - there is just you and the earth - nobody and nothing else - let your thoughts go quiet. Imagine your Chakras glowing just as per the picture shown here, the light charging the colors making them glow brighter and brighter.
Don't try to think about each color or aspect of the image, just imagine it as one thought or one image like a rainbow shining from within - imaging it is in your conciseness happening to you - don't think about it, it just IS. Hold this in your mind for a while, it might be difficult at first but will get easier with time.
For me this is a way for charging my Chakras and grounding myself.
It clears my thoughts and heals any dis-ease.
Another variation to this is to imaging it is not you but someone you love or someone who needs healing in some way.
If you get good at this, seeing just yourself from your conciseness with the rainbow of colors and pure white light from above washing everything else into the ground with a silent mind, there is more you might like to try. Imagine a brilliant white flower in front of you and loose yourself in the whiteness and beauty of the flower. Thank the Angels for this gift and thank Guya, our Mother Earth, for providing flowers for you. You might also like to try to use the image of a white flame on top of a white candle and loose yourself in the flame. Have nothing in your mind other than the flame.
Enjoy the silence.
Don't forget that visualizations are 'Mind Based' and that we need to exercise the physical as well - see the Downloads.