Wellness vendors tell employees that getting a good night’s sleep is important to overall health. Their sound observations include:

• Avoiding caffeine later in the day
• Keeping a consistent bedtime
• Sleeping in a dark, quiet room, and
• Turning off the computer 1-2 hours before bed.

Of course, Quizzify’s popular sleep quizzes include these Q&As because a few employees may not know them. But we also include 12 more things that many employees who have difficulty sleeping don’t know…and would benefit from learning because in every case, the required behavior change is as easy as screwing in a light bulb.

Speaking of which, that is the first of the Six Things we will cover in this two-part installment.

1. Energy-efficient light bulbs

Who knew? These give off far more “blue light” than conventional Thomas Edison-type incandescent bulbs. And blue light is probably one of the biggest causes of insomnia. Here’s an easy behavior change: screw one of the old-fashioned bulbs into your bedside table lamp. All you’d ever want to know about blue light can be found here.

2. Orange Soda

Everyone knows colas contain caffeine. Some folks know that most root beers and even cream sodas do too. But orange soda? Turns out that Sunkist Orange Soda contains more caffeine than Coke. Along with more sugar too. The good news is that, being orange-based, it provides some Vitamin C. (Not.) Here is a list of all popular beverages containing caffeine, including some you wouldn’t expect.

3. Over-the-counter headache relievers like Extra-Strength Excedrin

Yes, Excedrin. The irony is that caffeine is suspected as a migraine trigger. So the last thing you’d expect a headache remedy to contain would be caffeine. And yet it does. Some (but not all) medications labeled “non-drowsy” also contain caffeine. And while we’re on the subject of surprising sources of caffeine, let’s add breath mints, decaffeinated coffee, and any product that contains the word “energy.”