Do you always do the best you can?
Some people always do the best they can. Others might save their best for special occasions. Still others may never feel like they need to do their best. Good enough is good enough or maybe even a half-assed job is good enough.
What is you attitude towards doing your best? Where do you think your attitude came from? Teachers? Parents? Experience? Bosses? Age? Does your attitude towards doing your best (however much of the time you do it) have any drawbacks?