Critical thinking is a skill, and like every skill, it degrades without practice. Reading complex material, engaging seriously with perspectives you disagree with, writing out your reasoning rather than keeping it vague in your head, and seeking feedback on your arguments from people you respect — these are the habits that keep critical thinking sharp. One of the most consistently effective practices is writing. When you write your reasoning down, the gaps and weaknesses become visible in a way they do not when ideas remain inside your head. A thought that feels compelling when it is internal often looks different on a page — incomplete, circular, or dependent on an assumption that falls apart when stated explicitly. Another effective habit is seeking genuine disagreement. Most people surround themselves with people who broadly share their world view — this is natural and comfortable, but it means your thinking rarely gets challenged at the root. Deliberately engaging with people who think differently, reading sources you would not naturally gravitate toward, and taking seriously the best version of an opposing argument rather than its weakest version are all practices that strengthen thinking. A thinking practice is ultimately a commitment to intellectual honesty: being willing to change your mind when the evidence requires it, acknowledging uncertainty where it exists, and resisting the temptation to appear more confident than you actually are.