Also knowing when to tough it out vs. walk away an important question rather than simply 'don't give up'. I've seen someone dedicate for years to an idea that h

Also knowing when to tough it out vs. walk away an important question rather than simply 'don't give up'. I've seen someone dedicate for years to an idea that has (in my/friends opinion) little potential. It seems after a couple years they could have moved to the next venture as they are not unskilled. Then they would have better chance rather than going 5+ years on something that is going no-where.