Waking up for work at 5 a.m.
Americans go to work at 6 am and work for 6-7 hours a day. They get free from two in the afternoon. This is actually much more effective as you get the whole day to do other stuff!

Putting their feet on tables, chairs, and other things not meant for that
Americans don't really care about the things going around them. They keep their legs on other seats so that they sit comfortably. You can often witness this in the movies.

Giving firm handshakes
Firm Handshake reveals your self-confidence and how much you are reliable. So, when they greet people they usually shake you hand firmly.

Wearing the same shoes both at home and on the street
It is quite cold there and that is why the Americans wear their street shoes at home too. It is normal for them to roam around their house wearing shoes, unlike other countries.

Installing a shower right into the wall
In the USA, you will see that the shower is placed right into the wall, such so that you can slightly regulate the position of the shower. The other countries the shower is placed above the head.

Sleeping on very tall beds
The Americans have huge, tall beds in their bedrooms and it is all about comfort. They have these big fairy tale type beds to sleep in and it is also covered with a frame with a cloth.

Covering the floors in the house with carpet from baseboard to baseboard
As mentioned above, it is quite chilly there the whole time of the year because of which their rooms are often covered in carpet and the more cozier the better.