If you are a new Blogger, then perhaps the biggest problem is to decide about your blog name and topic. There are thousand of blogs out their in internet and you may find yourself in the situation that whatever name you decide may have been already in use. So, what to do? What about the topic?
I like to discuss about the name issue some later. First, I want to talk about the blog topic. Unless you are a full time Blogger, you may not have enough time for more than one blog. So, you have to decide carefully. My suggestion is that first try to give some thought about your goal of opening a blog. Why do you want to open it? Is it for just a hobby? Do you want to earn some money? Do you want to advance your career by establishing yourself as an expert on a particular field? So, you can see that there can be various reasons for opening a blog. You have to find your own reason.
If you want to open a blog for hobby then select your topic according to your passion. Suppose you are interested about dogs. So, in that case you can open your blog on this topic. If you want to make yourself famous in internet about a particular topic then open a blog on that topic. If you want to earn money then it becomes a complicated and difficult matter.
Darren Rowse has a very long and detailed about it: How to Choose a Niche Topic for your Blog? If you want to earn money then obviously you have to do a lot of hard work in this field. So, it is better that you write either about a topic that you know or you are at least passionate about it. However, there are some other things that you should keep in your mind. You have to remember that it is difficult to earn money with some topics such as history and philosophy because there are not that many advertisers in these two fields. On the other hand, there is a lot of earning potential with topics like car and gadgets.
Having said that I am not suggesting that you just think about gadget and business related topics. You can earn money with all most any topic but you have to work hard.
About name, don’t be too much selective or sensitive. There are many famous blogs that do not have a very attractive name but they are successful and they have become brand names. Engadget is perhaps such a blog. You can not find a name in any dictionary but millions of people around the world know and like this name.
In conclusion, I like to say that you do not need to be too much worried or anxious about the name and topic of your blog. In stead, just focus on the blog itself and produce some good content regularly and you will see some success.