The nearly $3 billion “Cash for Clunkers” program approved by Congress in 2009 did little to boost the environment and created few jobs, a new study released Wednesday found.

Successful careers are often built off of lessons learned, but it’s hard to believe business moguls like Steve Jobs and Mark Zuckerberg have ever faced a career slip-up. We turn to the Quora community to see what others have to say about their biggest career mistakes.

Will a new job really make us happier? A seminal study suggests no. Research suggests that instead of fantasizing about some dream job that doesn’t exist, we focus on pursuing meaningful goals in the here and now.