Foam board insulation is easy to use and a great DIY way to add some insulation. It comes in standard-size 4×8 sheets and smaller sizes, in thicknesses from 1/4-in. to two inches.

The OPTP Pro-Roller Soft-Density Foam Roller I tried was 18 inches long and 6 inches in diameter, which the company says is ideal for targeting smaller areas such as the IT band, hip rotators ...

"Foam rollers are an amazingly versatile piece of exercise equipment," she says. "Even better, because they're light, easy to store, and affordable—most range in price from about $10 to $30 ...