After a very long hiatus, right now I'm trying to get some surveys. And I'm wondering if someone can point me to a step by step breakdown of when to clear cookies after what surveys, when to expect things to credit, etc.

I just did a surveyhead survey and to my shock and surprise it credited immediately! So now do I clear my computer to do, say, a Greenfield survey?

I'm a total newbie with this, so if there's a current, clear, and concise breakdown for me (so I don't waste my time clearing cookies when I don't have to, or doing surveys that never credit because I haven't) I'd love to have it pointed out to me!

Thanks in advance!