In case she has blue eyes, blond hair, a red top and a friendly smile you can use all those elements to design your perfect compliment.
Let potential daters see you up close. Be more informal and casual in your conversation. Going into a conversation without anything to talk about can result in some awkward silences and can kill the conversation before it's even begun. As mentioned earlier, keep it lighthearted and stay approachable. That would make him laugh and think that you have a good sense of humor! Otherwise, you may come off as gloomy or boring.