It’s tough to have a manager who can’t make a decision. Without direction, you may not know what your boss expects or how best to push a project forward. You can help the situation by acting as a sounding board for your boss. Help your boss weigh the pros and cons of various actions. Ask sharp questions, provide relevant data, and offer your personal perspective. If your boss is still unsure, try taking charge. For example, if you’re eager for them to make a strategy decision, say: “There are several ways to address this. Can I try one and report back with my progress?” Even if these tactics work, keep in mind that an indecisive boss is likely to be seen as ineffective, which is ultimately bad for both your reputations. It’s wise to cultivate mentors in other parts of the organization, too. You need people who have your back.
Source: HBR