Sweet Dreams
For many of us, a good roll in the sack requires energy and the right mood -- elements that can be compromised when we are sleepy or tired.
While there is no direct relationship between slumber and better sex, a National Sleep Foundation (NSF) poll, conducted in 2002, shows people's moods can be affected by the amount of shut-eye they get.
People who sleep less than six hours are more likely to report they are tired, stressed, sad, and angry than those who sleep more than eight hours. On the other hand, those with few sleep problems tend to report they are "full of energy," "relaxed," and "happy."
In his practice, Russell Rosenberg, PhD, director of the Northside Hospital Sleep Medicine Institute in Atlanta, says chronic sleep-loss patients report not only being too physically tired for sex, but also having decreased libido.
Unfortunately, lower sex drive, tiredness, and grouchiness are the least of worries with sleep deprivation. Research shows people who don't catch enough winks tend to:
Get into more accidents. Inadequate sleep affects perception and motor skills. 
Find it harder to lose weight. Not enough shut-eye can affect the body's ability to metabolize carbohydrates. 
Have an increased chance of a hormonal or metabolic disorder, which can indirectly put you at risk for medical problems such as type II diabetes and heart disease. 
All of these consequences could undoubtedly put a damper on a person's sex life.
Rosenberg recommends trying to increase your total sleep time, even if it's just adding a half-hour or more per week. "Try it, and see how it affects your sex life," he says.

Relax
The brain may be the most important sex organ of all. It is perhaps in the mind where beliefs take hold and flourish about the effects of certain foods on sexual prowess, even as scientists deny any direct connection between diet and erotic fitness.
It is in the mind that people feel self-confident when they like the effects of exercise on their bodies. It is also where they feel happy and energized once they've gotten enough sleep.
Yet the inner workings of the brain can also keep a person from focusing on the delights of bedroom actions.
"In order to have a really healthy and pleasurable sex life, you have to be able to dismiss work; you have to be able to unwind and experience pleasure," says Zager. She says this means being able to temporarily forget about what your boss said, what was in the memo, what bills need to be paid, and what the children need.
Sex requires relaxation and time, adds Zager, noting that some couples may be too stressed and busy to enjoy or even have intercourse. She suggests setting priorities.
"Just how important is sex to you and your partner?" asks Zager. If it is vital to your relationship, she advises finding a way to work it into your schedule and working on making yourself less stressed or tired.
Some recommendations include eliminating some activities from your busy life, delegating jobs to someone else (by giving it to a partner, or hiring someone to do it), and doing an across-the-board cut in time spent on each activity.
To unwind, Zager suggests taking 5 to 30 minutes either to walk, meditate, take a hot bath, do yoga, or sit by yourself. This time can help charge personal batteries and can help make transitions between your work, family, and sex life.

To Your Bedroom Health
Living healthy may, indeed, have its benefits. If you eat a balanced diet, exercise regularly, sleep enough, and take time to relax, there's a good chance your life between the sheets will improve.
Of course, there is no guarantee. But, as Zager says, it all forms a really good foundation.
"If you've got a good foundation of stress management, and setting your priorities, and taking good care of yourself, then on top of that, you can build relationships with other people and an enjoyable sex life," she says.