write a novel... a GOOD novel.

english was always my favorite subject especially when i got into the creative writting courses and for as long as i can remeber i feel theres a great story for me to tell i just seem to go off and daydream and add more to the story as i go the problem is everytime i have a great idea i dont get the chance to write it down and by the time i come back to it ive forgotten it or cant remember it exactly the same and it ends up being well, less then good ive tried everything to get my ideas on to paper but i just need to put more devotion into itor some thing along those lines.