As a general rule, women are more approachable and less suspicious when they meet guys through the course of a regular day and in an atmosphere when they feel at ease, as opposed to when a guy introduces himself in a more typical setting (bars or clubs, for example). For a lot of women, anything with a meat-market vibe is not ideal for meetin men, and if you go through this list motivated only by a slavering desire for sex, women will detect that insincerity, and you'll fool exactly nobody. Don't look at these as pickup strategies; just think of them as generally positive habits that happen to have an added benefit.
Read the signals: A woman’s body language is a good way to determine her interest. Is she leaning towards you or are her arms crossed? Is she asking you questions or simply being polite? Is she playing with her hair or fidgeting to try to get out the situation? Follow her lead to ensure that you’re both going in the same direction. If she is not encouraging your interest, take a step back and let her be.