Staying active in sites and how much time spent?

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I was wondering how much time everyone spends on each site? How many sites are you in? How do you stay very active in each site? How do you keep track of all of the sites? Do you write information in a notebook? Do you have a specific time that you spend on each site? I am in about ten sites but only active in about seven of them. The three that I am not that active, well two of them are paid to click and the other one is yuwie. I was just wondering how everybody stays active on every site that they are in. Sometimes I think it is hard to stay very active in each site. I do keep some information in a notebook, just so that I can stay more organized. *Please do not refer me to any sites in this discussion.*