When it comes to gaining influence, remember the law of reciprocity: the more you support others, the more they will support you. If you want people to adopt your ideas in the future, you need to be collaborative yourself and support their ideas, or at least to show respect and a willingness to listen before weighing in. If you don’t, you may find that your initiatives will increasingly fail to receive full and fair consideration. The key is to learn how to reject or redirect bad ideas in a thoughtful, positive, and more collaborative way. This article offers six tips to avoid being perceived as a naysayer.