Be nice

When it comes to selling, whether in-person, online or on the phone, always make yourself approachable. Establish common ground so that you're more relatable to your customer, as this will help facilitate the conversation and humanize you as a salesperson.

By the same token, know when to back off from a sale – if you come across as too pushy or aggressive, you can easily nix any goodwill that you've built and turn a customer off for good.