1. for any spinning ball you have to wait for it; and like with pace, wait a little longer to play the short ball. it's really easy to play far too early, especially when the ball is flighted and short pitched, it can be hard for the novice to read. remember that flight slows the ball down, while the top spinner hurries you.
2. for many spinners, there will be huge drift. try to watch the ball and correlate the initial line with where it pitches. this will help to give you time to chose a good shot. if it drifts the wrong way then you know its the 'other one'.
3. length is harder to read than with quicks because the lengths are much closer. if you play forward to balls behind the 4 metre mark, you might nick a lot.
4. to advance, you also have to wait, just not as long. but this also makes it easier to actually get into line with the ball, unlike with advancing fast bowlers.
5. to sweep you need to be a little bit earlier. sweeping is no substitute for being able to read the path of the ball.
6. to practice, as well as setting the bowling machine to bowl spin, maybe create a team which only has spinners and play against them on a pitch that assists them. nets can be a bit predictable (but it's good for the muscle memory) and match play will also inform you of which shots are your bread and butter.