are you stupid? I was giving your a newbie tip. Use your brain, use the google keyword tool. why would we give you keywords..?
the highest keywords are up to limit 5-30 click per day. So if you want to make more money by focusing high keyword you should have a blog that very quality. It make sure for advertiser agree place high ads on your site.
Find keywords related to tech with a high CPC and use these keywords to write content, so you'll have high CPC adverts displayed on your site, then you just need to get traffic/clicks.
I use keyword spy. It tells you how much cpc you earn from that keyword. Its pretty good, giv it a try. They got a free version.
I use only 1 ad unit per page. More ad units, lower bids ads will be also served by google. Also try this tool to check how many advertisers are bidding on a specific keyword. labnol.org/google-adsense-sandbox/