As a new user, only 2 days old now.

I only just found out that I could accept an answer, because I curious about those green tick thing's. I did not know what they were. Now I know, but it was not immediately apparent to me.

I think a little more info when asking a question would go a long way to solving the problems of questions with unaccepted answers.

I would add little notice below the (Notify [email] daily of any new answers) message to say so that I can come back and click the tick to accept an answer.
or
This Tick lets you choose / accept the answer that was most helpful.