We stopped in over at Twig and Thistle and saw their tip for keeping your curtains at bay using a mini magnet (at the top and out of kids' reach). It can help keep curtains back without the use of a tie or hook which is great for renters. Although it only works on metal curtain rods, they suggest you could use a thumb tack on other types of rods. It's a simple trick to file away under the category of "awesome things I hope I remember later on!"
(Image: Twig and Thistle)