Drop-down lists in Excel are a great way to speed up data entry, keep your sheet tidy, and avoid typos. No formulas required!

The lean startup plan is a lot more concise and is designed for you to just jot down a few sentences on the problem, solution, revenue streams you plan to implement, how you'll market the business, ...

Many U.S. cities have too many office buildings and not enough homes. Developers are now converting some old offices into apartments and condos, but it's going slowly.