With passion. Blogging isn't a profession IMO, and there is too much noise about blogs and bloggers - there's no such thing as a blogger. A blogger is someone who has something useful to say and knows how to say it.
Build up a conversation by sharing what you know with your readers.
Avoid useless small talk and relaying what others are saying - that's old hat, and people won't remember you for that.
They'll love you if you give them something useful in their every day work - tips if you wish to blog on some technical issue, feelings and sentiment if you blog about life and lifestyle.
Keep in mind that it's no party - it's a lot of hard work and if you wish to do it properly it will take time for you to build up a readership.
Share and give away - these are the keywords to successful blogging.
Oh and one last thing - don't talk about yourself and how good you are - let others do that on your behalf - if they don't then something isn't working and you have to review your strategy
Good luck :)
