MarketWatch Money Challenge, Day 3: Make a plan to save 25% to 40% of your pay.

Now that you’re warmed up, here’s part three in our seven-day playbook to get your finances in top shape — and it’s not an easy one.

​Now that you’re warmed up, here’s part three in our seven-day playbook to get your finances in top shape — and it’s not an easy one.