4. A weighted blanket that doesn't overheat

Cooling Blanket, available at Gravity, $259

Weighted blankets are one of my favorite discoveries of the last decade. I used to think the quality of my sleep was mostly beyond my control (barring exercise and a good mattress and the typical rules of thumb), but these have markedly improved the quality of my sleep. I've tried and liked options as cheap as $70, but Gravity's white cooling version blends in the best with my bedding, and keeps me a bit cooler underneath it during the summer. —Mara Leighton, reporter

Read our review: I tried the new $250 Gravity Blanket, a weighted blanket that's designed to have a cooling effect, and it kept me from overheating at night

Read our guide: The best weighted blankets you can buy