I asked on https://www.facebook.com/groups/1014974001864957/permalink/1252338398128515/ and these were the main points:
- Set the tablet settings, on the driver and on the software used for drawing. For example, pressure sensitivity.
- Check the projection: what screen you're using to project the table and ensure the "constrain proportions" setting is checked.
- Consider line stabilizing software like Lazy Nezumi Pro (only Windows so far). Sketchbook Pro has this sort of line as well.
- Use Mischief rather than Photoshop for line drawing. It's simpler and produces more natural line drawing, which can be later exported for rendering in Photoshop.
- Get comfortable with using undo constantly.
- Use hard felt nibs for the tablet, the have increased friction and feel more like a pen on paper.