One of the first things you will need to do, or possibly last if you need some inspiration, after you pick your niche topic is to pick a catchy URL. You want it to be one that will stand out and that will be easy to remember for those who plan on being return visitors.
To get some ideas and inspiration, take a look at the various keywords that you have singled out for your niche to see if any of those have a catchy ring. You want it to be kind of "used car salesman" sounding, rather than something that is boring or does not have an original sound to it. For example, if your niche is "blah", you could try "MegaBlah", "Blah4u", "HouseofBlah", or "BlahKingdom". These will all be original, explain what you niche is, and, most importantly, will be easy to remember.
How easy your URL is to remember is the most important so that your visitors will not have any trouble returning and clicking on more affiliate links!
Placing Banner Advertisements On Your Website 
Placing banner advertisements on your website can increase your monthly revenue greatly. This option is better than being an affiliate for several companies because you will get one monthly fee no matter how many of your visitors go to the website or make a purchase. The main thing is for you to create an informative website filled with useful articles, so that you can generate a high amount of returning visitors. 
As your site rises on search engine rankings, the blank space on your site will begin to look more and more appealing to advertisers. Anyone can be an affiliate, but to have a banner placed in a good spot on a high-ranking website will bring in the most revenue for a company. 
Once you have established yourself as a site that can be profitable for them, you can rent out different spaces on your site for advertisers to place banner ads. Each month you will be paid the same fee, no matter how much they do or do not make off of you.