You take your cuttings from anywhere you want, including the the main stem/trunk.... and you never put them to flower, just keep cutting them to keep them the size you want. Cut them down to size, they grow back, and you cut again.
I usually do not take cuttings for clones all the time, so i usually take my clones from the middle of the plant where the folage is developed, but not close to dying.
Hope this helps....