What is a good strategy for skimming a text?

Answer 1

A bad strategy for skimming text is reading every word, including every "a, an, the" and all the adjectives.

A good strategy for skimming text is to see what the nouns and verbs are up to in the text and how they act on the object of sentences.

Example, with bold showing the words you should notice:

Charlie, with his boyish looks, and Carla, with her long brown hair and easy smile, each popular students, were both campaigning for Class President.

Answer 2

Skimming means reading the important bits, so you read bolded words and headings, then just enough of the text to understand the heading or bolded word.