I see from other posts of yours that you're a single male. I've written some advice for single males before, but I don't know that I can readily find it. Here's a few tips;
There is far more supply of single males in the lifestyle than there is demand. That said, there are far fewer single males in the lifestyle who are good single males in the lifestyle, and I'd venture to guess that the supply of good single males more or less equals demand. So, how do you make yourself a good single male in the lifestyle?
Generate a paid profile on swinglifestyle.com. If you go free, you won't be able to communicate. If you go free on any swinger site, no one will take you seriously. If you're paid, you show serious intent.
Your profile puts your best foot forward. If you can't assemble a sentence or two about yourself in your profile, most couples won't pay any attention to you. Be clear about what you want, what you're offering, what kind of guy you are. This is your chance to advertise yourself. Don't **** it up by talking about how big your dick is and how you're the best swordsman out there.
Be respectful of both the wife AND the husband. This should go without saying, but a lot of guys screw this up. You are being given a gift. Treat the experience as such. If you can't show respect to both the people in the couple, you're not going to get anywhere.
Don't send dick picks. Few, if any, women want to see this. For some couples, this is a deal breaker as it shows you're the type of guy they don't want to play with.
Don't be a flake. If you say you're going to meet a couple at a place at a particular time, be there on time. If you miss out, you're unlikely to be contacted again.
Always, always, always wear condoms. Don't even ask not to.
Understand your role. You shouldn't be in this for a relationship, and the couple in question isn't looking at you as a potential relationship. Know your boundaries; you are a toy. Sounds demeaning, but it isn't. You are a sexual fantasy being explored by the couple. Assuming you're straight, understand you're in the middle of this for her pleasure, not yours. If you focus on you, you won't ever see them again. Focus on her. Find out what she likes, what turns her off, what turns her on.
There's lots more advice to give. You can search this forum for more. The above is a good place to start. Best of luck!