I was just on the forums and this question crops up a bit, so I thought i'd share my tips with everyone...
WACOM INTUOS TABLET TIPS (note: graphire tablets do not have the software mentioned below)
Go to- start menu> all programs> wacom tablet. select the 'mapping speed' tab and set the 'aspect ratio' to 'proportional' (otherwise your tablet will be stretched to match whatever proportions your screen is, so to make the right curves on the screen your hand draws a different curve, which may cause brain meltdown).
open the 'tip feel' tab, click 'more options' and set up the sensitivity.
If you're using PHOTOSHOP: in the brushes pallette, select the soft airbrush. Click on 'other dynamics' and change both settings to 'pen pressure'- this will give you twice the control over size and flow, closely mimicking a traditional airbrush.
Also, if you are using photoshop, go to the keyboard shortcuts and learn them and adjust them to suit you. being able to change brush size, alternate between brush and eraser etc with your left hand using the keyboard while your right hand just keeps drawing makes a huge difference
If you're serious, google 'nostromo speedpad'. Get yourself one of these, program all your shortcuts into it, and you never even need to look away from the drawing. It's my second favourite thing after my tablet. With my cat coming in a close third...
bye,
Jesse
