Well, I had the same question a few years ago (Yedda didn't exist yet... :-).

In order to start orginizing your time you've got to have a bit of self dicipline. Take an hour or so on the weekend to make a list of chores, events and other things you have to do during the upcoming week. Write it in general, if you can try to divide it by days, if not just write it as a note.

During the week- every day, just before you go to sleep, make the "daily list" for tommorow according to what you wrote on the end of the last week. 

Most Important- Don't forget to leave some spare time for unplanned events that might come up during the week. 

It worked for me very well, after practicing it for a few weeks I started doing it in my head without writing anything, It even improved my memory when I get to think about that.