How to smoke in your house without people knowing
Open a window or fireplace duct.
Before you start smoking, it's very important you give the smoke an exit to escape. Without an open window or duct, the smoke will linger in the room and your health will be at risk.

Depending on the room you're going to smoke in, there should almost always be some window to open. A fireplace duct is an even better choice, as fireplaces are specifically designed to let smoke escape.

How to make your cell phone battery last longer
Turn the phone off.
Only do this if it's going to be for several hours; turning a phone on/off actually uses a massive amount of power itself. This will probably be the most effective and simple way of conserving your battery's power.

Why? This will help conserve energy and also charge your phone. If you don't plan on answering the phone while you're sleeping or after business hours, just turn it off.

How to potty train pet rats
Start by saving a tablespoon of droppings out of your rat's old cage.
Set it aside to put in the litter box, making sure the spoon carries no scent that could distract your rat from the litter box.
Clean your rat's cage thoroughly.

Put in fresh bedding and disinfect any toys or houses that might have dropping on them. Take a small, shallow box and put it in the corner where your rat generally does his duty.

How to clean a lifeproof case
Wipe small stains off with a cloth.
During daily use, you won't want to do a deep cleaning every time your case accumulates dirt or dust. In these cases, use a soft cloth.
Get the cloth damp with warm water then use it to wipe off the surface debris. Don't clean with rough pads or brushes.