1. Remember to regulate humidity. Mold is the real enemy of cannabis, but don't over-dry your crop. It should not crumble in your hands.
2. Check that there is airflow in the room. Its absence can raise the humidity, or dry out plants. Plus, the air will help your plants dry out faster.
3. Choose the right lighting. The white light will cause the crop to photosynthesize, which is highly undesirable during drying.
To be more specific, try initially setting 50% humidity at about 50-60°F (10-16°C). Remember to check your plants periodically. After drying, proceed to the process of curing your weed, which helps to strengthen your crop and "close" all odors inside the cannabis. Finally, enjoy your weed, but do it wisely!