Keep checking the offers page for new opportunities to earn. There's no set schedule for new offers. They appear randomly.
I suggest keeping a close eye on the offers section of this forum. FC members are great about posting new offers as they become available as well as their credit time.
Offers in the daily section such as tasks, surveys, and videos are can be done every day.
Also, not sure if this is your intent, but posting the same question repeatedly is probably not a valid way to earn 30 posts for the forum bonus