*Visualization Training - I use this technique to help me increase my ability to visualize clearly. It also helps teach control over one's own thoughts. -- Settle yourself down as in previous meditations. I recommend silence or a little white noise (for those of us who have to deal with outside traffic noises and/or noises made by other household members). Ensure pets won't come around for attention once you get started. -- Create in your own mind a blank screen and expel all other thoughts from your mind. Maintain this for as long as you can. When your mind begins to wander or other images enter your mind, start again. It's not easy. You know you're improving when you are able to stop your mind from wandering more and more quickly also when you are able to hold the blank screen for longer periods of time. -- The previous step can be modified as you improve by attempting to recall certain images in your mind in as much detail as possible. For example, look at an object for several minutes then close your eyes for how long you need to recall the image of the object in your mind. Practice makes perfect. -- The previous technique can be modified by instead attempting to create an image in your mind of an object (animate or inanimate) that you haven't recently studied in as much detail as possible. You can then increase the difficulty of this by designing a room in your mind and furnishing it with whatever you choose and then each time you do this exercise, conjure up this image in your mind in the same exact detail and maybe even add other rooms.

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The hardest part is keeping my mind from wandering, but I notice that the more I try, the less it wanders.

Exactly!