I can't give you advice for making much money, but I can give you advice that will help boost your hub score.
Write original material. Even when I write hubs to promote and sell products, I try to add a little interest to them. For example, when I wrote a hub about turquoise jewelry, I included some history about the stone.
Add photos to your hubs for added interest.
Research SEO and keywords and include them in your text.
I seldom write a hub less than 500 or 600 words, unless it's a recipe. Even then, I try to make it at least 400 words.
Read hubs written by others and leave comments.
Participate in the forums in a friendly way. Never personally attack another hubber. This will result in a ban.