2. Do your research
One reason why a lot of people hire mangers and not do the investing themselves is the fact that the world is filled with people who want to rob you of your money. There are a lot of con artists with schemes that seem picture perfect at first glance. Earn money in 6 months with minimum investment, everything will seem too good. One advice, check it out. If something seems to good to be true, it probably is.
Before you invest in something, make sure that you have done some background checks on the company running it. Looking at their websites or visiting their offices are not enough. You need to look thoroughly at every aspect of the company. Check the transactions that it has made over the years. The number of years that the company has been operating is a pretty good clue too. Stay away from new companies as much as you can. They may be operated by con artists.
This is actually what most people in asset management do. Do you know the old saying "Don't put all your eggs in one basket." Heed that. Put your money in different business investments. That way, when something happens with one, you still have the other one.