You should avoid hosting services which have servers which are constantly down. A good hosting company should be able to monitor its servers and quickly fix problems. Some hosting services may be down as long as a few days, and these are companies you will want to avoid. It is also important to make sure all the features offered by the company work. If your email is down, this prevents you from being able to run your business. This is something you can't afford, and you will want to make sure you stay away from companies which do this.

Another thing which is important for you to look at is tech support. How long does it take the tech department to answer your phone calls or emails? A good company should answer within a few hours. Some hosting companies take many days to answer your questions, and the answers they give you may not solve the problem. Hosting companies like this should be avoided. You should also look for hosting services which communicate well with their customers. A lack of communication is one of the leading causes of business failure. You don't want to do business with companies that don't effectively communicate.