First and foremost, the most important thing for you to do is to make sure that you get to find a niche.
Before you even decide to get into commercial photography and actually make a living out of it, you need to see what you are good at and where you should concentrate on when it all comes down to it. Although it may be true that you should not be all that choosy when it comes to the side gigs that you are getting when you are just starting out in the world of photography, that does not mean that your interests or preferences should all be scattered as well. Try to read up on articles online about the different kinds of photography out there and find out which ones seem to pique your interest the most.
That should be a pretty good start. You need to have a substantial enough background idea in order for you to be able to form your opinions accurately. Try to talk it out with the rest of the other people you may know who are also in commercial photography. Ask for an honest assessment of the kind of work you do and what they think the perfect niche is for you. Finding your niche in commercial photography is as important as finding your personality and finding your place in the world. Work hard at it and keep going until you actually establish it.
Be as diligent as you possibly can and brace yourself for an onslaught of failures in the very beginning.
There is no such thing as you not being good enough and you technically end up failing in the process. That is not something that you would like to do at all and more so, that it not how things are bound to happen. If you tend to face a lot of failures at first, what you need to understand is the fact that this is all in the beginning. Keep working at it and you will eventually learn how to make things work for you. Set all of your goals accordingly and get rid of any kinds of doubts in the beginning. Take a few small steps at a time until you are able to reach the goals that you have set for yourself as well as for your commercial photography business.
Strategize your marketing channels accordingly.
You will need to build a website as well as maintain a blog. You will also need a professional email address with a fairly professional domain. If you want to be able to muscle your way into the commercial photography world, what you can be rest assured of is the fact that they will be unimpressed with a domain account name that says yahoo.com or something fairly generic. You do not have to spend a whole lot of money on this. It requires a small capital and a little work on the side. It should pay out in dividends if you work hard enough in making sure that you are able to cultivate it.