I especially like to do this activity as 10 things I LOVE because it's so positive, but there are other good variations like:
10 things I hate
10 things I am scared of
10 things I think are disgusting
Anyway...
1) Have students take out pen and paper, and list 10 things they love. Make your own list first and put it on the board as an example. For instance:
I love coffee
I love autumn
I love puppies
Etc.
2) Once they finish, choose one of the things on your list and explain WHY you love it. For example:
"I love autumn because it's not too hot, and it's not too cold. And the leaves change colors and fall to the ground. And it's often windy. And there's a special energy in the air that the other seasons don't have...etc."
3) Have students get into pairs or small groups and explain to each other why they love the things that they love.