You should easily be able to get at least $25 a month without too much effort. Just by doing the daily email and paid to click you should have $5.10 in a 30 day month. That leaves you to having to earn an average of $0.66 a day with any of the offers/bonuses/promotions. You do have to earn 5 cents in between doing the ptc but that is easily accomplished if you're actually using the site
Daily surveys range from $0.50 to $1. FCsurveys are usually $.75-3 . Surveys are all about demographics. Some people don't seem to have luck fitting them and others make the majority of their money that way. I can usually qualify for and get credited for at least 2 surveys a day. I always try each daily survey at least twice a day and check FC surveys in between daily survey attemts
Tasks are usually a couple cents each and can add up pretty click. The same with videos.
Radioloyalty gives you a penny for every 10 minutes played so if you're sitting at your computer anyway that will add up
There are two weekly promotions. One is midweek relating to sports and another on the weekend relating to random topics. Those are usually good for an extra $0.05 a week or $0.20 a month.
There is a $3 bonus for posting at least 30 contributory posts per month. You shouldn't post just to post but ask questions, answer questions, participate in the off topic discussions, etc. Posts in the words chains or under the contest/promotion boards don't count towards your 30. You usually receive this bonus at the end of the next month. (I received May's bonus on June 30 for example)
There is also a $1 bonus for posting proof of payment once you get it