Help with good clear writing

Hi

I'm a professional author of many years' experience.

I'm keen to develop an online product to help people write Good Clear English. To do that, I need your help!

Can you please tell me the three biggest questions you have about writing English. Questions like 'What is a noun?' 'How do I use semi-colons?' or 'How do I structure a sentence?'

If you give me your three questions (not the three above!), I'll send you a free copy of the product when I have finished it. I expect the product to be ready in March 09.

Many thanks
Chris West