I liked your Idea of writing while listening to some sort of music whose tempo matches your speed. It creates a perfect rhythm. and Accuracy and Speed can be Improved drastically.

My tip to improve your typing speed is to... listen to fast paced music... I makes your blood beat a little faster and if you are sitting, your energy needs to escape somewhere... therefore, you will have a faster typing speed... :)

What really helped me improve my typing speed is... Lots of dedication... you can't get anywhere without dedication... or muscles... you need those too... :)

What really helped me improve my typing speed is... mountain dew... lots and lots of mountain dew!!
But then again, a squid needs no mountain dew... :)

When my fingers hurt after too much time on the keyboard, I smack them with a hammer until the pain goes away then continue... Just kidding!