Trellises are great. Another option I use on bushy/unruly/floppy plants is plain old cheap-ass white string that you can buy anywhere. Start at the bottom, lift branches, start wrapping string around plant and continue wrapping in a circle as you move up the plant, tying it off as you lift the branches, kind of like the way they wrap Xmas trees, but not as tightly. Works for me.....and brings buds closer to the light source.