Hi, They are all OK. Use the comma if you want the reader or listener to pause and think for a moment. eg There , (listener has lots of time to turn his head in the direction you are pointing and to see what is there) you can see

Not necessary; it would just clutter the sentence.

This sentence looks wrong to me...Please help and tell me why! They have appeared on message boards and in blogs, and spread by word of mouth.

Yes, it appears awkward, though I take the meaning: They have appeared on message boards and in blogs and have been spread by word of mouth.

It depends on whom you ask. I'm sure nearly all Americans would use a comma after May 29 and probably the majority of Britons too. However, some British newspapers such as The Guardian have a dislike for commas in dates and write the date as

Hi everybody, My background is in toxicology, but I'm always looking to improve my writing skills. I joined this forum hoping to get some friendly advice on the rules of grammar when I need it. I must admit that I'm a bit embarrassed to

It is polite enough. But I would suggest a grammatic change (separating the "via post" explanation with commas) and, perhaps, a shift in why you are sending it. For example: I have applied online. However, I would also like to send you

Actually, neither is fully correct, but the first one is more correct. I would punctuate thus: The custom was to call once for each kill; but this was Angry Face's first, and, in his excitement, he kept yelling. You want to separate the

I'm nowhere close to finished. -- Better: I am nowhere close to being finished. Poker online, unlike live poker, if you wait for good cards, you won't get paid whereas in live... In online poker , unlike live poker, if you wait for good

I would use commas in both, the first because it is a fronted sentence adverbial (you wouldn't need the comma if the phrase came at the end of the sentence), and the second because its omission mis-references 'however'. After XXX fell in 1937 ,