quick flowering plants

so i already have a plant that i plan to have for a while (LST for a while) and i am a VERY impatient person. my resolution would be to grow a second, quick grow. im not sure, however, how to go about this project.

im growing by soil, with both regular flourescent tubes and CFL. should i give it 12/12 from beginning to end? or perhaps start it for the early seedling stage as 24 hour light (say 2 or 3 weeks) then jump into flowering.... HELP PLEASE!?!?!? i want a quick yeild, but enough that i wont have to buy weed for say a month

thanks :jointsmile: