One skill that will always find favor among website owners and marketers alike is copywriting. Indeed you will need to not just provide details about the product or service but additionally motivate the potential buyer to purchase the merchandise. Clearly you shouldn’t seem too obvious as well. People who hold such skills can make some helpful income on the web. French readers that are interested to learn more on this can have a look at this article about copywriting (copywriting) because it contains some interesting point.
There are numerous places where you can find job on the net. Sites just like Freelancer.com or Rentacoder.com do provide some useful opportunities for you to make money. You may want to take a look at webmaster forums where there can be some job offers posted. The money that you could earn will depend on the standard of your writing. Recently I have run into this French content on web copywriters (emploi redacteur web) and this may be rather helpful for you to have a look.
Otherwise you could also have an interest to operate your personal website. In this way it will be possible to monetize your articles yourself rather than working for someone else. You may use Google adsense or any other kind of advertisement to make money. You can still sell the web page if you are dissatisfied with the amount of money you made. One excellent article which i have lately come across (French only) is site design (creer site internet) and should prove interesting to take a look.
Copywriting is really a skill that’s always very popular. As the web is dominated by content you will always have demand for article writers. The total amount that you could charge will all depend on your articles quality.