The best place to keep a wireless router

On a bookshelf. Situate it on a desk or a tall shelf in a central location in your house. A router works best when elevated, since it sends signals in all directions. The worst place to have a router: in the kitchen. Metal appliances can disrupt its signal.
The best place to solve a problem

In the shower. Monotonous tasks, like lathering up, may allow the mind to wander and boost creative thinking. In a Psychological Science study, participants who completed a simple task between solving creative problems performed better on the problems than those who completed difficult tasks or no task at all.
The best place to add a houseplant

In the bathroom. Plants are a staple of your living space, but you probably haven’t thought to stow one next to, say, your shower. Plants can filter indoor air, helpful for small spaces like bathrooms. Ferns are a low-maintenance choice: for a shady bathroom, try a Boston fern. In sunnier bathrooms, place a Kimberly Queen fern. A classic NASA study that identified air-purifying plants found both types of ferns filter air of chemicals like formaldehyde (found in tile grout and paper towels; can cause nose and throat irritation) and xylene (found in household cleaners and perfumes; can cause dizziness and headache).