This is quite possibly the easiest job in the history of mankind, it just takes a while to do.
here's how it works:
you go to to a webpage I will provide you with. Random text from a website will come up. You categorize it as "spam", "positive", "negative", "neutral" or "non-english". Positive and negative refer to the site's opinion of something, for example: "I just bought an iphone, it's great!", while negative would be: "I just bought an iphone and I'm really disappointed in the features". Neutral would be when the content isn't about anything or doesn't make sense, eg: "today was a busy day. first I did some gardening, then I went to the store..."
Requirements: Strong/Native english skills.
Accuracy is a must.
This is to be done by a person, if the results do not appear to be accurate, then it's off. If it's done well, there is a good likelyhood you will get future work.