How do you guys stay updated in your invested stocks/businesses?

I've been investing in the stock market for little over 5 years now. It has been an experience like never before and has helped me gain capital that no job or just savings would be able to produce. Throughout the years though, there is one thing that has been a bit troublesome for me though. It is not easy to stay updated with every company I've invested in. I mainly invest in long-term quality companies, but keeping track of every single company just doesn't work. Those companies have been a little slower though since they don't ten to grow extremely. Thus, I created a part of my protfolio where I invest like 10% of my capital in higher risk/return stocks. There has been many companies that seemed like really good deals, and they were because some of the companies I wanted to invest in grew by several hundred percents. The reason I didn't invest in them was because I couldn't always make a proper decision. For one, sometimes, getting an understanding of the business outside of their own reports, earnings and business model, has been, well not difficult, but let's say not enough information to make an actual decision. Two, the companies I've invested in takes a lot of time to keep track of what is going on with. Keeping track of news, insider holdings, change in management, change in direction of business going etc. So I was just wondering two things. 1. How do you guys take your decisions if a company is worth investing in or not? Where do you get all your information from? 2. How do you keep track of the companies you have invested in? To ensure if you should keep your money there or sell because certain developtments, changes in business/management etc? Edit: for example, just yesterdad friday, the stock market took a huge hit. I don't keep track of the stock market every single day (I work a regular job). So how do you stay informed like what happened yesterday?