Thx for your explaination Lanx. I really appreciate it. I know I have to learn from trial and error when doing adword, I don't mind about that. I asking you guys because I think you got more experience and already making money with adword, so it speed up my learning process, better than just read an ebook right?

I'm just not sure that I'm doing the right thing when setting up my campaign, thing like :
1. delivery method standard or accelerated is better? (when I should pick that choice)

2. Ad scheduling, should I turn on this (what time I should turn on it, consider that I sell in US market)

3. Position preference, should I turn on this too? (when and in what condition?)

4. How much % budget to set up without having risk losing much money (according to commission that I will get from sale )

5. How many days should I run the campaign until I can make decision to continue or just delete that campaign -> I know this involve campaign's history and ad position, but I need suggest here : Am I have to lose first to get good ad position and after that gradually lowering my bid and get profit later, or just deleted that campaign if cost me more than I get?
how many days this process as a common guide.

I hope U can help me with this matter Lanx, cause I think U have more experience than I do and already making money with adword so I asking U and anybody in this forum who can help me as a noob. Thx Lanx!