I got done for 34 in a 30 myself, and had to attend the speed awareness course (Northamptonshire rules).
One useful advice they gave on the course was to enter 30 mph zones with a low gear, low enough that at 30 the engine will be revving a bit. Hearing the engine revving helps to get a feeling for the speed you are doing, and helps to keep it below or just above 30 without having to watch the speedo all the time.
Also, if you keep too high a gear the engine feels like it wants to bog down, to which the obvious answer is to open the gas to go a bit faster, just the opposite of what you need.
Personally, I have found the advice useful.
Ride Safe,
PS
edited to correct stupid oversight
Edited: 02/04/2009 at 08:11