what is the best way to get good quality traffic from USA/UK/Canada? i think most of adsense ad clicks got from that countries.
Have content which US/UK/Canada people search for......and they will automatically get on to your site, which might increase the clicks. As more visitors = more chances of getting clicks.
Place the ads so that they can be easily spotted and make them look attractive. If you have links, make their colors the same as your site link's, this will surely increase the click rate!
Yes, use google insights to know what people from those countries are searching for online, learn who their celebrities are and the celebration events which come back every year, such as 4th july in the us.. Anyway, you have to know what they like as a people, their traditions.
write thing related to us...canda..uk. normaly you will get visitor from these country another way is to buy targeted ads from google adwords and facebook and choose only these country
Best way for adsense clicks are more visitors to your site or blog. If more people come at your place then click ratio will also increased automatically.
If only your content for US/UK/Canada I think then your clicks earning will be increasing automatically.
First of all, you can do some seo methods for attracting more people from these countries, and then, you can buy some awards from google.
Try also to submit your site to sb sites, article directories, site directories that is US based. Maybe that will help you.