First and foremost, you need to have a discussion with yourself about how you are going to represent yourself and your blog. Consistency is key, so whether your blog is travel, lifestyle or something a bit more niche, make sure you have a clear idea in your head about what it is you are doing.
Do some research and have a think about how you are going to stand out. Will it be creative graphics and imagery, a unique combination of topics or your writing style? Don’t forget, there are a lot of blogs out there now so make sure yours pops.