excerpted from Quora.com
Lose your inhibitions. There are going to be times where you’re sure that you and/or your partner look completely foolish to anyone watching, but accept that that’s part of the fun. You are going to make mistakes and everything will be okay.
Think thoughts about staying low to the ground. One rookie mistake is considering swing to be a bouncy dance. An easy way to look more advanced than you actually are is to smooth out your movements while staying on the balls of your feet.
Keep your arms floating at waist level. Don’t glue them to your sides and don’t hold them stiffly. If they aren’t engaged with your partner, then keep them ready to do so at any moment’s notice.
Partner with everyone. There’s a tendency for people to partner selectively – some people prefer to always dance with people better than them, some always with people worse, others with only people at the same level. Each of these categories has a lot to offer you. People who are better than you will show you, both explicitly and implicitly, how to get better; people who are worse will teach you how to partner better and be more adaptable; and people your level will be willing to experiment with you on the same level.