When starting seeds indoors, keeping a high humidity environment will improve and speed up germination. To create a humid environment around your seeds. reuse a dry cleaning bag as a humidifier. You may need to place a few taller objects along the sides to keep it propped up, but the larger size of the bag works well especially if you have a lot of seeds to start.
Remove the bag once the seeds germinate as sprouted seeds do best with good air flow around them. You can also use the bag as a humidity dome when taking cuttings as many cuttings benefit from extra humidity while establishing new roots.
Cover Image by Joe Strupek, used under its Creative Commons license.