Summarize the following:
These 3 words can be difficult to spell correctly because they are so commonly used, and they're pronounced the same. "Too" is what you use to show that there's an excessive amount of something, such as "She ate too much chocolate" or "They watched too much television." "To" is the form you use as a preposition before a noun, such as "go to the store" or "run to the end of the block." "Two" refers to the number 2.  "To" usually indicates going somewhere, so to remember it, think of "go" and "to" each having just one "o" and one other letter. "To" is used as a preposition and an infinitive phrase conjunction. You can tell "too" means excessive because it has too many "Os" in it. While this rule doesn't work every time, it will point you in the right direction most of the time. Remember, a verb does action, while a noun is what does the action or has it done to it.  Another way to remember the difference is think of cause and effect, replacing "cause" with "affect." "Cause" is causing the effect, so "affect" is affecting the effect. "Affect" is only used as a noun when it means it produced a feeling or "affect." It's the root of words like "affection." It's also the root of "affectation," as another meaning of the verb "affect" is to "put on a pretense." Likewise, "effect" is used as a verb when talking about bringing about change, as in, "to effect change." "They're" is a contraction of "they are," such as "They're going to the movies" or "They're eating apples." "Their" is the possessive form, such as "Their car is next to yours" or "Let's go to their house." "There" tells you where things are, such as "The cat is over there" or "Please go and sit right there." Remember, "there" shows you places, so it has "here" in it. " "Where" asks about the location of something, such as "Where are you going?" "Were," on the other hand, shows something happened in the past, such as "They were going to the store when they got in an accident."  Another common mix-up with these words is "we're," which is a contraction of "we" and "are," such as "We're eating oatmeal." Remember to look for "here" in "where" to help you remember it's a place word. Even though these words aren't exact homophones, they can still be confusing. Just keep in mind that "than" is the word you use when comparing things, while "then" refers to time, such as "then and now."  For instance, you'd say, "She's smarter than him," or "They ate more bananas than the other table." For "then," you could write, "We ate better back then," or "The area was quieter then." Remember, the verb does the action, and "accept" will always be a verb that means to take something given by someone else or to agree to something. "Except" means everything but a few or all but one.  For example, you may write, "I accept your gift," or "I accept the situation." On the other hand, for "except," you may write, "We need everyone working hard on this project, except for Roger, who will be heading up the secondary team."

Summary:
Use "too" to show an excess, "to" as a preposition, and "two" to refer to a number. Pick "affect" for a verb and "effect" for a noun. Use "they're" for a contraction, "their" for possession, and "there" to point to an object. Pick "where" for location and "were" for a past-tense form of "to be. Choose "then" for time and "than" for comparisons. Pick "accept" for the verb and "except" for a preposition.