1) Be direct and honest. 2) Keep it casual and natural. 3) Mention it in context of a relevant conversation. 4) Avoid sounding desperate or overly eager. 5) Be prepared for follow-up questions. 6) Don't apologize or seem ashamed of your status. 7) If online, ensure your profile reflects this information. 8) If in person, choose an appropriate time and setting. 9) Respect their reaction, whatever it may be. 10) Be open to discussing future relationship goals if appropriate.