The third one,all the time,,,,if you dig ditches,be the best ditch digger out there,,,,My Dad had more rules than Leroy Jethro Gibbs and the Pope put together..but the three that got beat into me more than any other was...1)"Every tool has a job, and every job has a tool...don't mix them up." 2)"If you grab the bale..be sure you can tote it where it goes, if you can't..don't grab it". 3) " No matter what you do..even if it's ******* up...be the best at it you can be and don't quit till the job is done".