So for my friends (and me), here are some tips I gathered on how to use this amazing lens.
1. There's no zoom, which means you'll need to move a little bit more to frame your shots. But don't come too close.
2. It's not a macro lens. The minimum focus distance is 45cm. Smaller than 45cm will have a problem with focus.
3. It's very fast. The larger the aperture (f1.8), the more lights hit the sensor, which means you can use faster shutter speeds even when there's not much light around. This will result in sharper images. Your ISO can also stay relatively low, which means less noise.
4. It's very sharp. For sharper images, stick with f2.2 or higher, but remember that this lens doesn't have image stabilization so for really dark scenes always use a tripod.
What's so amazing about this lens?
It allows you to separate your subject from the background and makes it more prominent. It challenges you to rethink, reframe, refocus. You can't stand in one place and rely on your zoom. You have to move and make the effort to frame the image. AND IT'S CHEAP. xD