when starting a new campaign, how much are you willing to lose before you give up on it? Also, how long do you let a campaign go before you start deleting keywords, etc..
i have found that two weeks is ideal for me sometimes it has taken this long to see success from my adwords campaigns
how much do you spend for testing before you give up on it, and how long before you starting tuning? Also say if you spend 100$ per day for 1 week to test, can i just do 700$ in one day?
For argument sake lets say you are selling a clickbank product... Rule of thumb for me is once your adspend equals one commission (Of course you don't use that same rule if you are selling a product that has a huge commission of hundreds of dollars)
I think that depends on business revenues , if you earn a million $ a month you dont mind loosing 100 $ on a campaign... but if you earn 200$ a month you cant afford to loose that money