Niche
While browsing the internet about marketing techniques and overall online business a lot of it boils down to niche. A niche is simply the topic you choose to make your website on. Most commonly referring to Google Adsense, depending on the niche you are in, you have the possibility to make more money per click if the niche is larger, compared to small niches. For example niches in marketing have fairly high yields, like this blog, while other small niches would pay lower. The reason behind this is solely based on the advertiser's competition in the market - the more competition the advertiser has to get their brand out there, the higher the price they are going to have to pay- thus, the more money you will make per click 
.
Here is a small list of some of the top paying niches to be in today:
Agricultural equipment
Antiques and Collectibles
Anti-aging
Architecture
Automotive
Banking and Finance
Business Process Outsourcing
Cancer (all types)
Car and auto insurance
Communications (ISP/LAN/Wireless)
Computer Hardware
Computer Repair
Specialized Software (CAD, SAP)
Consumer Electronics
Credit and Finance
Debt consolidation
Dedicated Hosting
Dentistry and Orthodontics
Distant learning
Electrical Appliances
Engineering Schools
Exotic Restaurants and Foods
Forex
Furniture
General Health
Health and Medical Insurance
Heavy Equipment
Industrial Machinery
ISP and Networking
Legal (personal injury law)
Loans and Mortgage
Mesothelioma and asbestos cancer
Digital Photography
Military Equipment
Offshore Job
Online Degree
Pawn Shop and Jewelry
PC and Internet Security
PLC and Pheumatics
Psychotheraphy
Real Estate
SEO software and tools
Solar panels
Sports (boxing and MMA)
Sports (car racing)
Sports (golf)
Telecommunications Companies
Tourism & Luxury shipping
Web Development
Weight Loss
