Having good writing skills is important, but probably not the only important thing to start blogging.
I don’t want this blog to be “yet another exhibitionist’s diary”. It means that i don’t plan to write about what i did during the day even though sometimes it might be interesting :).
So, the content should be interesting enough to resonate with other people’s thoughts.
Another problem is how other people will find my blog. But that’s already a technical problem and i like solving technical problems :).
And one more potential problem is to decide what you allowed to post and what not. The company i work for doesn’t have any official blogging policy, but i think common sense will work just fine.