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.