Contrary to what many people think, building any site on what you like and your interests is not a very good idea. It’s not going to be very profitable. I still can’t figure out why people 
want to build niche sites based on personal interests. I guess it could get me started with learning Internet basics, but it wasn’t going to build a cash flow. I found out very quickly that there were more profitable markets to build my sites around. Make sure you provide the niche that people want.
Don’t create a product then find the niche, you need to do the opposite, find the niche then supply the product. You need to remember that just because a certain phrase pays well, doesn’t mean you will get a good search engine ranking for it, or that people will be attracted to your page. Should you go after high paying phrases regardless of topic? Just remember not to jump on the phrase bandwagon unless it’s related to your website. Also, make sure it’s something you have a passion for.
Did I just mention “passion?” I sure did! In regards to AdSense, if you are not passionate for the theme you have chosen, then just forget it and move on. This lack of passion will come across to the visitors on the site and you will soon get tired of spending hours updating. Whatever it is you choose to build at a business. You have to become known as an expert in whatever niche you choose. It’s not as hard as it sounds. Building an Adsense business online can actually be done in one day.
I know that you might be one of the 20% that just doesn’t know how to do any of the steps listed above, but while you continue to read the information I have put together, you will learn. So we don’t want you to be afraid to try!
One thing you have probably heard dozens of times is that if you want someone to buy something from you, then you have to a recognized expert on the topic and give them something of value like an ecourse or an ebook. This will ensure future sales.