What to look for in a guest blogger depends on the type of blog you have. If you are promoting a business then it should be relevant to your business. At the same time it should be something distinct from the one that you usually write.
Ideally you should update your blog at least once a week. You should be selective how often that you have guests and it should be for a relevant reason. A good balance would be using a guest around once a month in the beginning. This would give people another perspective for them to look at.
Think about the prominent people in your business and who you would like to hear from. While it may be asking a lot to get the biggest name there is no harm in asking to see who you can get hold of. Most of them will have their own websites where you can contact them either directly or via a representative.
Equally you should not underestimate people in your own business. They can offer a different view on your business and how they experience it. This is often effective if you have mentioned them in a previous blog and give them the opportunity to give their point of view. Alternatively you can also talk to your suppliers who can offer their views on how the industry works and their role in it.
Local community people are often worth getting in contact with if you are planning to attend a local event. They will often be looking to promote the event and will be happy to have the opportunity. You can often add a comment at the bottom to indicate where and when you will be attending the event.
A good guest writer should write clear posts for people to read. It should not be too long but equally should not be too brief either. A good level is between 300 to 500 words. It should be concise and offer clear points, giving the reader an interesting story with relevant points.
What to look for in a guest blogger can be found on social networking sites, other company websites, newspapers and other forms of media. It is worth developing contacts and getting in touch with them if they have any timely events to report on. Look at how they write on their own sites and social networking posts to see if their writing style is appropriate for your website.