Do you put a comma before and in a sentence?

Related questions

1. Is there a comma before or?
2. Can you use a semicolon in a list?
3. When listing three things do you use a comma?
4. Is there an Oxford comma in Spanish?
5. Does the comma go before or after so?
6. How do you punctuate lists?
7. Do you use a comma to separate items in a series?
8. Are serial commas necessary?
9. When to use a semicolon instead of a comma in a list?
10. Does MLA use the Oxford comma?

Tags

1. #sentences
2. #these
3. #comma
4. #wrong
5. #would
6. #clauses
7. #independent
8. #sentence
9. #since
10. #before
11. #although
12. #necessary
13. #considered