Saving money doesn't have to be boring. The viral 100-Envelope Challenge circulating on TikTok has become a low-pressure way to save about $5,000 in only 100 days — one envelope at a time. Here's how ...

When I felt off track, I tried something small and strict: spend no more than $100 on "extras" for seven days. Groceries, fuel, and bills stayed normal; everything else lived inside that one number.