2. coordinating conjunctions [fanboy(s)], parallelism, and commas

also see
2) V-D-2: comma, comma splices and run-on sentences

When to use commas with FOR, AND, BUT, OR, YET, SO, NOR
source: JamesESL English Lessons (engVid)     2015年10月5日
quiz: http://www.engvid.com/writing-skills-...

Coordinating Conjunctions and Comma Splices
source: mrthoth

When to use commas with AND, BUT, OR, FOR, SO, YET...
source: AlexESLvid

What is parallelism in grammar?
source: dek2635 
Conjunctions: coordinating conjunctions, subordinating conjunctions, and correlative conjunctions
source: LearnAmericanEnglishOnline   2008-10-25

source: LearnAmericanEnglishOnline  2008-10-31

Too or So?
source: JamesESL English Lessons       2013年1月28日
quiz: www.engvid.com/too-or-so/

Coordinating Conjunctions
source: Iken Edu