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1. Get Competitive
Sign up for a 5K race or schedule a game of tennis. Merely anticipating a competition triggers a 24 percent boost in testosterone for women, according to a study published in the journal Evolution and Human Behavior. And any increase in that hormone also drives up your libido.

2. Turn Up the Heat
Prior to sex, take a hot bath, or, if you're short on time, place a warm washcloth over your vulva for a few minutes. Heat boosts blood flow to your vagina, leading to increased lubrication and sensitivity, says Hilda Hutcherson, author of Pleasure.

3. Tell Steamy Bedtime Stories
Write an erotic story featuring you and your partner, then ask him to read it aloud as he tucks you in. Lack naughty-writing know-how? Commission a sexy tale from the pros at customeroticasource.com. A 500-word turn-on starts at $30; a 5,000-word story runs $425. For a racier read, you can send in a few pics and request customized illustrations.

4. Sip a Sex Tonic
Let an ancient sex stimulant work its magic: Warm some milk, add a pinch of saffron, and drink up, says Aliza Baron Cohen, author of Sex: Rediscovering Desire Through Techniques & Therapies. Saffron, which releases its intense flavor when heated, has been considered an aphrodisiac for thousands of years.

5. Strike at the Optimal Moment
During the first two days of your cycle, your testosterone levels surge, your libido soars, and your breasts and clitoris become ultra-sensitive, says Gabrielle Lichterman, author of 28 Days, a daily guide to your menstrual cycle. Intense orgasms may happen more easily than usual — and multiples are much more likely.

6. Recharge Your Batteries
Women who use vibrators say they have an easier time reaching orgasm during (vibrator-free) sex with a partner, according to a survey of 1,656 women conducted by the Berman Center. If you're tech-friendly, try the iBuzz, a vibrating "bullet" attachment that plugs into your MP3 player and stimulates you in time to your favorite tantalizing tunes. (Available at ibuzzusa.com; $60.)

7. Step Up for a Quickie
For stellar sex in a hurry, pull on a skirt and find a deserted staircase, suggests Sex for Busy People author Emily Dubberley. If you're shorter than your guy, stand a step or two above him. Face him or turn toward the railing so he can enter you from behind. (Hint: Grip the rail for leverage — and don't lean over too far!)

8. Try a New Rhythm Method
Raise your odds of climaxing during sex from 23 to 77 percent with the Coital Alignment Technique, says Dubberley. Have your partner lie on top of you, with his pelvis directly over yours. Wrap your legs around his thighs and rock together gently. Push up and forward so that your clitoris makes contact with the base of his penis. Patience is key: Find your rhythm and stick to it until you orgasm.

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