I think you have to get used to drawing on screen without looking at the tablet, I mean it's not something your gonna master right away, but like anything worthwhile, the results will be worth it.
I have a cheapo tablet, I certainly don't intend to spend £300 on a decent one, but I think it's a general practice to avoid looking at your tablet - it's an instrument and the work is being done on screen so get into the habit of working like that. Before long it'll be instinctive to draw with it regardless of your zoom level. I find myself only using the tablet for actually drawing - trying to set options or tools is just a pain, so I use the mouse to set my options and select areas/lasso - using the stylus purely to draw with.
Maybe it's worth just messing around with it for a while, try and get used to zooming into the area your working on only, and practice drawing smooth curves or whatever at different zoom levels. Tablets I find are much better for organic looking stuff, they can be a great help when making base textures too, but for sharp details stick to the mouse.
