Firstly, welcome to the blogging community!!
I can offer you this advice from personal experiences having started mine about 3 months ago.
Firstly, decide on a writing style. Focus on one direction and stick to it. If it's technical offer insights into your particular field of expertise. If it's general try to include content that won't alienate too many people. If it's humerous try and be original.
Work out what your blog pages will look like before you start. Eye catching ones will attract more people than the bog standard ones. Photos or logos are always a good idea to draw people in.
Initially use a free blog site but warn people on the first page they may have to get past pop-ups and ads.
Keep writing! A blog that has one post a month will get a lot less visitors than one offereing new posts every day. Sometimes it's difficult to get motivated after a bad day at the tables but try and stick with it.
Don't expect miracles overnight. It takes time for word to get around but if people enjoy it, they will tell others and pretty soon word will spread. Day One of my blog attracted just 25 visitors...however, I'm now on Day 70 and averaging about 10,0000 hits a day so it does work!
Keep your ear to the ground and take notice of what your readers say on their feedback and comments. It will probably end up steering itself in a direction that you never intended it to when you first started.
The right people in the industry will contact you if they want you to expand the blog to other mediums but be patient and wait for them to call. Bad bloggers get their names spread around the Web just as quickly as good ones.
And most important of all...enjoy yourself!
Blogging can be a really fun way to spend a couple of hours during the day and when you get nice feedback from your readers it makes the effort completely worthwhile. Some people who make their living from writing started their careers with blogs so it can be fun AND lucrative.
Contact me directly if you want a list of sites, servers and add-ons. I'll e-mail you a full list and give you any other advice I can.
I hope this little bit of info helps in some way and really hope you decide to give it a shot.
Best of luck my friend.
Snowman
Diary of a Crap Poker Player