Start your oil paintings with an acrylic underpainting - When you start an oil painting using oils, it can take some time for that initial layer to dry. Starting your painting with an acrylic underpainting however is a wonderful time saver as acrylic paint dries quickly and oil paint can be applied over the acrylic.
Make certain you have good lighting - I didn't realize how important good lighting was until I painted outdoors for the first time. Good lighting brings out the color and also lessens the strain on your eyes. If you can, paint in a place that gets plenty of natural sunlight. If you cannot afford this luxury, purchase a good indoor light. Check out http://www.ottlite.com/ for a great selection of lighting products.
Make sure you have good ventilation - If you are using materials like oil painting thinners and cleaners in your studio
