Struggling at work - looking for tips.

Even if you work for flat rate, five minutes or less of double checking will never kill you. And you had better be test driving before and after your work! A brake job takes very little time to check, there is just not that much to check. Bigger jobs take more, but never too long. The best way to be sure, of course, is to never walk away or let yourself get distracted until the bolts are tight or the parts are installed. You are in a job where a missing or loose bolt can have serious consequences. Also, and I speak from experience, the sales guys will never feed you work and will not work hard to sell your work if they know there is a good chance it is coming back. You owe it to yourself, the other employees and the customers to minimize your distractions and double check your work.