"If security in a hotel is a questionable issue, hang a glass on the doorknob before you go to sleep. If someone tries to open the door, you’ll wake up, and the intruder will be frightened by the sound."
"You can “iron” your clothes in the shower. Just hang your clothes on hangers and turn on the hot water for 5-10 minutes."
"If the curtains fit together loosely, and you are obstructed by light from the street, use a hanger with clothes pins to secure the halves together."
"You can wash a soiled item in the sink by plugging the drain with a piece of toilet paper in a bag. You can also use softened soap."
"The ironing board can be easily converted into a workstation. It can also be used as a changing table, or you can put suitcases on it."
"Instead of using a special door card, use any other card when you leave the room."
"Sometimes the electricity is only switched on if you’re in your room and have inserted your card into the corresponding slot. But what if, for example, you need to charge your phone and go somewhere else? You can insert another plastic card, even a travel card, into the slot."
"The TV remote control in a hotel is a dirty item. To avoid soiling your hands, wrap it in a shower cap or a disposable slipper bag."
"If in doubt about the quality of the ice, do not put the cubes in your drink. Instead, place the glass or cup in a container of ice."
"Use a magazine or restaurant menu to dim lights that can’t be turned off."
"Many rooms have a hair dryer. This is useful if you need to dry your wet shoes."
"Roll up a towel and place it under the door. This will make the room quieter and darker."
"If there’s nowhere to put toothbrushes, use toilet paper. An extra roll of toilet paper is usually left in the rooms."
but i also have never been to McDonalds-Country.
Merica amirite
Depends on the country. In South America they’re usually not when you go into cheap hotels, which is also where you’d want to use this technique
All of these are basic or dumb ideas that won't work in a low budget motel, or are meaningless (towel under door is a safety hazard only illegal room smokers do).