Summarize:

The location you select should not be cluttered or loud.  You should feel at ease before starting yoga meditation.  If the location is noisy, an advanced yoga practitioner may be able to deal with external influences, but beginners will find it distracting.  Ideal locations are either free from technology and machinery, or otherwise block the sounds our mind must make effort to filter out. Somewhere with a lot of natural light through windows is preferred over flickering electrical lighting. Aside from the sounds they produce being a distraction, the machines that produce our heating and cooling are not as naturally pleasing to the body as a cool breeze or the warm sun.  If yoga meditation in the outdoors is not a viable option, choose somewhere with radiant heat like a wood fire or hydronic heat. Create a cross-flow by opening a door or a window, so fresh oxygen is pumped into the location.  Accentuate the location by selecting a location with minimal synthetic material.  Wood floors with natural oils and waxes have less static electricity, and are conducive to yoga meditation. If you live in a high pollution area, performing yoga meditation inside may actually be preferable. Studios where large classes practice yoga can become stuffy, building up carbon dioxide and lessening the available oxygen. A yoga mat can be used for added comfort. If you have a full stomach, you could relax so much you’ll feel drowsy.  And if you time it too close to meal time, the hunger pains could be too distracting.  Attempt to schedule your meditation when you are comfortable, perhaps a few hours after a meal. An alternative would be to eat a light snack before mealtime and then meditate. With a brief warm-up, your body will be more limber, relaxed, and able to better focus on meditation.  You’ll also likely be able to sit for longer periods of time if you’re more limber.  Focus on your core and back for just a few minutes, with various, light twists and bends.  A few of the following Sukshma Yoga exercises can also be very beneficial:  Use two fingers to lightly squeeze the eyebrow several times. Roll your eyes in circles several times. Rub your temples and jawline. Grab your ears and pull downward softly.
Select a quiet environment. Choose a spot with natural heat, cooling, and fresh air. Time your meditation sessions around meals. Do some light stretching or exercising.