If you have a room with natural light, set up shop there; if the basement’s the only option, score soft track light, not fluorescent—they’ll give it a dungeonlike feel.
2. Pick a neutral paint color
Jim Ryno of the Iron House Gyms design firm suggests soft whites or beiges: “Dark grays and blacks give you no motivation.”
3. Don't skimp on cardio equipment
“You get what you pay for,” says Ryno. His top picks: the Woodway Curve Treadmill, the Assault AirBike, and the WaterRower.
4. Invest in the basics, then add
Start with a set of dumbbells (5–75 pounds should do it) and a space-saving bench (Rogue makes some nice ones), then supplement with med balls, a jump rope, and kettlebells. You’ll never have to leave home to train again.