The best option is the least expensive and most available: Expose yourself each day to natural light. If you have trouble getting up in the morning, try walking then. Or, if you fall asleep early at night, try a late afternoon or early evening stroll. This will help to keep your circadian rhythm properly aligned, encourage nighttime sleep, and reduce improper sleepiness or sleeplessness.
Another option is to increase your exposure to artificial, indoor lighting. A few strong bulbs that establish an extremely well-lit area may also be helpful. It will be important to limit your exposure to this lighting at inopportune times (based on your needs). There are even alarm clocks with bulbs that simulate dawn by providing increasing light as morning approaches.
Unfortunately, tanning beds are not to be used. These do not have the proper spectrum and intensity of light. Moreover, they will increase your risk of developing skin cancer.
