Cite
Step1
Compare the verb "cite" to its most common synonyms: quote, mention, reference, illustrate, arraign and summon.
Step2
Think about more familiar, related words that use the same root or prefix. For example, "citation" has the same root "cit" and a similar meaning: a reference to an authority, a quoted passage, a summons, a mention or an award.
Step3
Memorize a phrase that pairs "cite" with one of the familiar terms with a similar meaning that you understand better. For example, memorize the phrase "Cite a citation" and recall it whenever you are unsure whether to use cite, sight or site.
Sight
Step1
Consider the noun "sight" within one of two contexts: "vision" and "appearance." Its synonyms for vision include eyesight, view, vista and scene. In the context of appearance, you can replace it with the synonyms aspect, look, spectacle, display, visibility and observation.
Step2
Use "sight" as a verb: its word meanings include to see, glimpse, notice, observe, target or aim toward.
Step3
Think of the compound words "sightseeing" and "eyesight" whenever you wonder whether "sight" is the appropriate word to use. Almost everyone understands the nouns "sightseeing" and "eyesight" and their inclusion of the term "sight" will easily illustrate whether it is the correct noun to use under the circumstances.
Site
Step1
Understand that "site" is mostly commonly used as a noun defined as a position or location.
Step2
Know that "site" is also an action word meaning to locate, to position, to put or to place.
Step3
Compare "site" to related and more commonly used words "situation" and "situate." Situation is a noun whereas situate is a verb. Think of the phrases "situate a site" or "the site of the situation" when wondering whether to use "site" in a sentence.