Take stalkers seriously, ignoring them doesn't help. Be firm, not aggressive when you say no. Repeat yourself. Don't change your words or tone. Do not try to understand their perspective. They will try to enrage you, keep your cool. Don't arrange to meet a stalker on your own to 'sort out the matter'. The situation could escalate. Tell people whom you trust. Don't feel ashamed. Don't fall prey to the stalker's 'I'll tell people what happened between us'. Be with people. Don't restrict your life, but don't put yourself in high-risk situations either. If you feel you're being stalked, seek help immediately. Don't wait for irrefutable proof.