Many yrs ago i was making "decent" income with adsense (about $150) per month but over the yrs the income has dropped. Probably due to laziness/bad investment decision or not being consistent has made my income drop (30 euros per month) to be where it is today. This yr i decided to be a bit more aggressive (probably now that i married ) and want to make more money off the net selling product. I decided to try and sell physical products (thru amazon, Google Affiliate Network) as an affilate to see if i will increase my revenue. I bought this product in Warrior forum in January 2012 where the guy gives you niches which he has already tested and are are profitable (check my signature link). The only backlinking i have done is through social bookmarking. Within one month of creating the site I am generating nice traffic (see screenshot below -posted the same screenshot on warriorforum). I'm sure with more backlink building i can rank up higher within the search engines Probably later on I will post a followup on the results and possible income generated. The highly competitive markets eg credit card, insurance, mortgage, weight loss are hard to compete especially for new sites but there are many physical products subniches out there in many markets that are not being exploited. The best strategy i am discovering is that when you have a profitable subniche product, register an exact product domain keyword then do some basic backlinking, its very easy to outrank old established sites. I've had success in the travel market with this strategy where i have outranked tripadvisor on some keywords All the best in your internet marketing