Gold
That is a fantastic summary, and I think it should be stickied in the beginners section. It seems that so many newbies come here looking for basically free money. And there's nothing that's free. Even with the sig campaigns, you have to work and it's not easy to get into one that pays well. This guy doesn't seem like he'd be a good fit for one anyway.
The absolute best way to get bitcoin is the simplest. You buy it with fiat dollars or whatever your currency is. All the other ways don't exactly pay well, or they're incredibly risky (trading, gambling, etc.). But glad this answer was posted. It covers everything newbies are asking for.
The easiest way I think is by joining in some signature campaign in this site,
You would be pay by posting some constructive post in the threads.
And if OP doesn't lock up this thread, this is going to be suggested 1000 times by signature campaign posters who don't read. But look at OP's post history. Do you really think he's going to get into a sig campaign? I think not.