I looked at your profile & see that you're a straight male. I know that many men may want a list of ideas that tell them touch a certain place, a certain way, for a certain amount of time. Studying basic sexual physiology & function IS a valuable tool. But beyond that, you'll need to delve into the more elusive aspects of sexuality which are all based in the mind.
At the risk of belaboring the same points mentioned in the other comments, I agree that you should talk to her, ask what you want to know & let her know you're listening to her responses. This will make her feel you understand & care, which makes a happier & all around more receptive partner. When a woman feels like that, she's often more confident & it may be easier to open up about her desires. Many people won't bother to speak up if they feel no one is listening or cares.
Try to engage her in talk about what she likes, not only while engaged in sex, but also outside of the bedroom. If you want to try different things, but are unsure of how she'll react, consider mentioning it beforehand when you have time to talk about it. You could say, "You know, I heard about (fill in the blank) & wanted to know what you think about it. Do you think that's something you might like to try?" And if you get a negative response of some kind, you can easily smooth the waters by letting her know you're just trying to think of new ways to please her & you'd do anything to turn her on.
Some women may not be fully comfortable expressing their wants & needs, so "listen" to body language during intimacy. For instance, she may not say how much she likes the way you're doing something, but the sounds she makes or an action such as arching into your touch is information you can use. You can also try to draw her out during sex by asking, "Do you like that?" or "You want more?" or "How about this way or if I go faster?" These questions require limited answers & may be easier for some to answer than just, "What do you want me to do?" or "What do you like?"
Learning how to please someone is a journey, take your time & use opportunities both inside & outside of the bedroom to really get to understand your partner & what pleases them. Just be sure you're also conveying your desires as well, this should be a two way street!