20 Things to Do When You're 30 That Will Make Life Better at 50

". . . Go to the freaking dentist already," writes Quora user Caroline Zelonka. "Get your little cavities fixed as they come up. Unlike many body health issues, dental problems only get worse — and things like crowns and implants are uncomfortable, time-consuming and expensive (like, close to five figures per tooth for an extraction, implant and crown). If you have a good savings and income stream, the bills won't be the painful thing — but there's no getting around the pain and the time suck."