Improve your communication skills. Good communicators listen carefully and speak effectively. The more you pay attention to what others in your grapevine say and the more you think before you talk, the less likely you are to say something inappropriate when discussing sensitive issues. Note and analyze the information flow through your grapevine. Once you've established a solid role in the grapevine, take note of how the members interact with one another.
Information is power.
Whoever gets key data first generally has more influence than employees who receive it later. Evaluate and revise your plan when necessary. Periodically evaluate your participation in the office grapevine. If not, revise your job-search plan so that you can achieve your objectives. Of course, you shouldn't rely solely on the internal grapevine to get a new job in your company.