A quick tip that will avert the problem before it happens.
Quick Tip: Never Run Out of Paper Again
Nothing stops me in my tracks like running out of paper right as I’m printing that important handout for a meeting that starts in three minutes. Advance warning lets you keep working--you're alerted that you have to fix the situation sometime soon--but you're not disrupted from what you’re currently doing.
Put a colored sheet of paper about 20 sheets from the bottom of the ream of paper in your laser printer. When the colored sheet comes out, you know you have 20 sheets left before you need to reload. That advance notice can be all you need to refill the paper when it’s convenient, so it’s always there when you need it. (The color doesn’t need to be brightly different, it can be an off-white or ivory. Just enough that you’ll know it’s there.)