[Q]: Which of the following solutions is better for the following goal:
How can I easily add waves to long hair?

[A]: Wet hair and make into a tight ponytail and allow hair to dry, later undo the ponytail and flip fingers through your new curls.

[Q]: Which of the following solutions is better for the following goal:
Anchor cords so I can braid them easier.

[A]: Use duct tape to anchor the three (or more) cords to a table or other surface to keep them from moving while braiding them.

[Q]: Which of the following solutions is better for the following goal:
To make a box out of panels.

[A]: Make 4 side panels and top and bottom panel. Attach the side panels to the bottom using screws. Attach the top panel using hinges to one of the sides.

[Q]: Which of the following solutions is better for the following goal:
push pin

[A]:
pinning poster to a wall