If you put something down temporarily, say it out loud. ("I've put my phone on the dresser.")
People often forget things, but there are ways to remember things better. One way is to say what you've put down temporarily out loud. This engages many more areas of the brain (particularly the language centers) which creates a richer memory and makes it less likely you'll forget where you put it.
Some people have said they use this trick for everything.
"I'll also say it out loud when I turn off stove burners, blow out a candle, or unplug my hair straightener. I’ve found this helps me eliminate those moments where I leave the house or am in bed and I’m suddenly like, 'Did I leave that on?"
Another way to remember things better is to use a mnemonic device. A mnemonic device is a memory trick that helps you remember something by associating it with something else that you will remember more easily. For example, one way to remember the order of the planets is to use the acronym "MY VERY ELDERLY MOTHER JUST SERVED US NINE PIZZAS." This stands for Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
You can also use pictures to help you remember things. For example, if you want to remember the order of the colors in a rainbow, you can imagine a giant rainbow with each color in order starting with red on the bottom and going up to violet on the top.
There are many other ways to remember things better, but these are some basic tips that everyone can use. By using these techniques, you can improve your memory and make it easier for you to remember important information.