Then get ready to push yourself much harder than any boss would. I started a small business many years ago which has grown into a very successful enterprise. The one thing I didn't expect was to be working 6 days a week and in the beginning about 12 hours per day. If you want it you can get it but you have to pay your dues my friend.
Expect to be harassed by local, state and federal authorities. Contrary to what you may have heard from others the government is NOT your friend. The harassment comes in many forms such as regulations and of course taxes. Whatever you do make sure you follow all of the laws especially the tax laws. If you run a foul of the IRS you can kiss any success that you wanted or may already have goodbye. I have seen horror stories from associates who thought they were smarter than the IRS and they end up paying gigantic penalties on top of excessive interest and of course the original payment that they should have made. Never ever screw with anyone who has more lawyers than you!
Aside from the above study the area you are going into. Make sure there is a real need for your business. You can be sitting around with your friends one day and think that you might have a good idea. One of the reasons you may assume this is because "no one else has done this yet." That might be a good thing but usually the reason it has not been done is because there is no need for that particular business. So, do your research.
I knew when I first began that I had one chance to succeed. I had saved some money and it took a very long time as I come from a financially humble background. So I rolled the dice but before I did I went through many, many weeks of research to make sure that the one try that I had was going to work.
Also, stay optimistic. Don't let the daily grind get you down. If you have employees they will show up late, want to leave early and quit without notice. Is that all the time? No. But it happens enough to know that you better be a good judge of people in order to succeed. And you also better be out there leading the way showing them how it's done- lead by example.
Finally, I sure hope you succeed in a big way. But, remember when you do many of the people who were rooting for you won't be there to pat you on the back. There is a world full of people who want you to succeed....until you actually succeed and then they become jealous. You have no idea how jealous until success arrives. That doesn't mean that all of your "friends" will act that way, but look out!