Yes, companies will pay you to install apps (or place ads) on your cell phone and leave them there. These apps often run in the background and track your spending/purchasing habits but if you’re not one to really care who knows what groceries you’re buying that week then this is seriously the easiest way to make upwards of $300 per year for no reason.
Every affiliate program offers different commission rates (along with rules that you should know). For example, some programs give out 20% commission, but only on the exact product you posted on your site. In other affiliate programs, you’d receive commissions from any product sale the referred person bought from the store, as long as he/she completed a full checkout within a specific period of time. For example as an Amazon Associate, you are given a 24 hour cookie window.
MozBar – MozBar is a Google Chrome extension that lets you Google any keyword and see how competitive the search results are. The higher the DA (domain authority) and PA (page authority) the more competitive the keyword is. However you still want to click on the top results and browse the content to make sure you can creating an article/video that is better than whoever’s in the top results. That is really what “researching the competition” is all about.
The topic you choose must have enough depth that you can create a lot of content for it. This is important for building an authoritative site, for search engine optimization, and most importantly, for the end user. If you don't have enough content about a topic, you're not going to be taken very seriously as an authority on the topic and it's unlikely you can convince someone to make a purchase from you.