Examples of being proactive are packing a briefcase the night before a meeting, reducing the risk of crime by hiring additional police officers and doing laundry before all the clothes are dirty. Proactive means acting in expectation of future needs or problems.
Being proactive means that a person anticipates a concern that may occur in the future and either prevent it from happening or lessen the impact. People who are proactive are usually structured and organized.
An example of proactive in a sentence is: He took proactive steps to improve his grades by studying all the math examples the teacher gave him.
Words related to proactive include careful, perceptive and wise. Words that have the opposite meaning include short-sighted and careless.