Your sex drive is referred to as your Libido . Your libido is affected by many things, health plays an important role as even the most rampant male will have a low libido if he is unwell, keep yourself fit and healthy and you will have plenty of energy when it is required.
Aphrodisiacs:
Some science says that certain chemicals or vitamins can increase your libido thus many aphrodisiacs or potions and lotions are available claiming to increase drive or even make any woman drop at your feet, food stuffs lased with zinc are apparently best, (please dont try this @ home).
Viagra:
The most wildly used wonder drug for sex is Viagra but we think is only available for men which are not generally the sex that need to improve, and don't most men walk around with a constant hard on anyway? I know I do. It is unsure if the drug actually increases desire for sex or just makes him ready.
Women are often left far from sexy after a day of sometimes stress, household chours and children if you have them. Women generally need to be slowly aroused and they need to feel secure and comfortable, plan the evening together make it romantic and don't rush it.
If after these simple steps sex drive is still a problem then there are further ways drive could probably be increased.