Mmmm...making a girl cum using your mouth will be fun! Don't worry too much about doing it wrong...as long as you're not hurting her, it's all good! Slow licking around her labia will get her wet, direct licking on her clit will probably send her off really good. You can use your fingers to keep her lips spread open so you can get her clit good. Pay atention to how she responds to what you're doing...and ask her if she likes it or if it feels good once in a while until you learn what gets her going best.
Below are some ideas from
www.sexinfo101.com:
Cunnilingus Techniques:
The Lick
Leaving your tongue soft and jaw relaxed, try licking her from vaginal entrance up to her clit and following the outer edges of her vagina along both sides. Repeating this technique going up and down and vice versa can be a great opener.
Labial Hold
While holding the two parts together with your lips, run your tongue between the inner and outer labia one side at a time.
Tongue Intercourse
The majority of a woman’s nerve endings in her vagina are around the opening and within the first couple of inches inside. Target them with your tongue by inserting it into her vaginal opening. Techniques are pretty limited due to the length of your tongue, but try moving your tongue in and out, as well as in circles around the inside of her opening.
The Flick
Spread her outer vaginal lips with your fingers. With your tongue pointed, gently flick your tongue around her clitoris. Feel free to roam, but keep coming back to her clitoris, as it is the most sensitive. This drives some women wild, and others find it to too intense. When stimulating her clit make sure to start out gently if you aren’t sure how she likes it. When you try this, pay attention to whether those moans are ecstasy or pain.
The following techniques should not be introduced until your partner is really hot (i.e., very wet). These are more intense techniques, and may be too intense for some women, even when nearing orgasm.
The Clitoris Suck
Expose her clitoris by spreading her lips and lightly pull back her hood. With her clitoris exposed, give it a quick little suck; pulling it into your mouth briefly and letting it go. This is a lot like licking a bit of cake batter off of your pinky. This feels incredible, and is a fine thing to do if you feel like tormenting her – but don’t overdo it! We recommend not using your teeth nor using heavy suction when starting out.
The Clitoris Hold
Take her exposed clit into your mouth and gently suck on it, simultaneously flicking your tongue over and around it. This can be done very lightly or very aggressively, and combined with fingering, will usually rapidly produce an intense orgasm.
The Tongue Tube
Roll your tongue into a tube (if you cannot do this, forget about it because it is genetic and you can't learn it). This technique works best in an inverted or 69 position. Roll your tongue into a tube around her clitoris. Slide it back-and-forth; in effect, your tongue is doing something similar to a woman's vagina around a man's penis. This is likely to bring any woman over the edge to an explosive orgasm.
ABC’s
Try using your tongue to spell the alphabet on her genitals. This works surprisingly well as your tongue is always moving in different directions. Learn her favorite letters and the orders that work the best!
Other Tips
A good lover’s hands never stop moving, so keep exploring, insert a finger, or massage her thighs while you perform.
You can also try using a wide variety of flavored gels, oils, and lubricants. Some of these products heat up when rubbed or blown to add extra stimulation.
Having a mint in your mouth while you are performing cunnilingus can also improve your results. The mint, as long as it is not too weak or strong, can create a very intense tingling sensation to enhance your performance.
Combining your mouth with some finger play is good too...more from
www.sexinfo101.com:
Vaginal Fingering Techniques
When performing the following, make sure that your fingers are well lubricated. There is nothing more uncomfortable (and painful) than a dry finger roughly rubbed across a woman's clitoris or pushed inside. See the sexual lubricants product page for information on useful lubricants. In most cases, proper foreplay stimulating a woman’s erogenous zones will usually avoid the problem of dryness. Nevertheless, it never hurts to keep a "tube of lube" sitting nearby. Under no circumstance should you put pressure or blame on your partner for this if it happens; work with her to get around it. It’s written all over this and every other sexual information site, but in case you have forgotten, communication is key.
Fingering the Vagina
Most women masturbate by rubbing a finger or two over their clitoris, sometimes "through" the skin of their inner or outer lips, in a circular or back-and-forth motion. You can do this too, and it is most helpful to ask, or better yet, have her show you how she likes it done. Lie down side by side, and put your hand over hers while she shows you what she likes. You can also try having her hand over top of yours guiding.
External
Another technique which women are very receptive of is to have your partner lie on her back, spread her vaginal lips wide apart with your outer fingers, and use your middle finger to rapidly slide up and down her vagina rapidly and lightly grazing her clitoris. This motion alone will often bring a woman to orgasm. Don’t forget to use your mouth while you are fingering, keep kissing her, her neck, and all her other erogenous zones.
Internal
An excellent way to begin manual stimulation is to stick one, and later two or more, finger(s) inside her, with your palm cupped over the mons area. We're talking about that fleshy "mound" over her pubic bone. Your finger should have freedom to move in and out freely while the palm of your hand can add pressure against her vulva and clitoris. Once you get better, you can start moving your palm to add more stimulation.
Another, more intense motion is to position your hand so that you have one or two fingers inside her with your palm facing her body. Now bend your fingers inward and move them in rapid but short movements focusing on her G Spot. This technique can quickly bring your woman to orgasm, especially when combined with cunnilingus.
Please Scroll Down to See Forums Below 
