Sponsored by Firstup. We’ve all encountered employee onboarding nightmares. Perhaps your manager forgot your start date. Or maybe the tools and technology assigned to you didn’t work. If we were to poll a random group of people, the list of onboarding horror stories would be endless. Want a reality check? Try a quick Google search — the results are fascinating. It’s easy to laugh about first-day disasters. But the truth is that a poorly executed onboarding process has lasting repercussions. Here’s why:  A staggering one-third of employees decide whether to stay or go within their first 90 days on the job. Replacing