Be Polite!

Be Punctual

Use humor, especially if it's a difficult situation

Establish common ground by agreeing when possible

Get used to and practice small talk

Be patient

Go to pubs

Use open-ended questions instead of making declarations

Ask if you don't understand

Bring a gift if you visit someone's home or are a guest in a workplace

Respect personal space and privacy

Brag

"Kick up a fuss"

Take yourself too seriously

Rush the English to a decision or not involve them in decisions

Swear in the workplace

Interrupt

Ask direct personal questions if you don't know someone well

Take your shoes off when visiting someone's home (unless they want you to, but this isn't the norm)

Be directly critical of others or their ideas

Assume they don't understand your language

Insult their monarchy or their heritage