by Spirituality » Mon Jun 04, 2012 3:55 pm
Do make yourself familiar with the object you're trying to visualize in any way you can. Put it on your phone, though perhaps as a background is not respectful. Find a black and white version, copy several times and color it (I did the latter) etc.
In general it's a good idea to start with the general shape and move on to add more details, though it does sometimes help to start with a detail and work from there as well. Just keep experimenting with it and keep trying, and the image will likely get clearer in time. Still, I know of many long time meditators who cant get an image at all: they just meditate on the description.