1. "Your" and "You're"

"Your" applies to something that belongs to you.

Example: That is your drink.

"You're" is the conjunction for "you are."

Example: You're very smart.

2. "Their,"  "They're," and "There"

"Their" applies to something that belongs to a group of people.

Example: That is their table.

"They're" is the conjunction for "they are."

Example: They're going to Disney World this week.

"There" applies to a place.

Example: Target is over there.

3. "Here" and "Hear"

"Here" applies to where you are.

Example: I am standing right here.

"Hear" is one of the five senses, using your ears.

Example: I cannot hear you.

4. "Whether" and "Weather"

"Whether" is used to introduce the first of two or more alternatives.

Example: It does not matter whether we go out to eat or stay home.

"Weather" is the state of the atmosphere with respect to wind, temperature, cloudiness, moisture, pressure, etc.

Example: The weather today is rainy.

5. "Whole" and "Hole"

"Whole" applies to something in full.

Example: Yesterday, I ate a whole pizza.

"Hole" is a missing piece.

Example: There is a hole in my jeans from where I fell yesterday.