According to the Society for Human Resource Management, 23% of US companies offer sabbaticals. With this number ever increasing, there's no better time to bring up the conversation with your employer. Asking for a career break is rarely easy, but a sabbatical offers more than a chance for you to recharge. Time away can be a vital opportunity for a company to identify stress points, reduce expenses and test aspiring leaders before they move up. This guide will walk you through every step you need to take to convince your boss to say yes.