I’ve always been honest and loyal to companies that hire me, and this has been a huge lifelong mistake. If you get a better offer than the one who hired just hired you, be rude, quit, and move on to the next one. Employees who get ahead in business are the ones who are selfish. I’ve never had it in me to backstab someone who hired me just because a better offer came in a few days or weeks later. I’ve been wrong in this. When I look at people who are willing to backstab companies at the drop of a hat… they are the ones who get the better jobs and higher pay. But as a preventative measure… only apply at the places that seem perfect, at first. Wait 3 weeks, then move to a lower expectation and apply at all the backup places.