Be a good guest

Show appreciation.
Here are some really simple ways to show your appreciation :

Gift certificate to their favorite coffee shop

Fresh baking for their early morning meeting.

Invite your friend or co-worker out for a cup of coffee or a drink after work

Give a hug. Yes it can be that simple.

Make a candle light dinner at home for your spouse.

There are some phrases to express your likes and dislikes:
I like

I hate

I love

I don’t like

Having a 'flat' intonation or not stressing the 'politeness' words in a sentence can make a statement sound indifferent even if the actual words used are polite.

Describe products and give opinions.