The trick is to make each post or article be as tightly focused as you can make it, else you'll be competing with tens or hundreds of thousands of others writing to that same title. A good plan is to think of your basic topic, write an outline or bullets, then take each main point of your article and divide it into topics to cover separately.
Example: If you write about parenting and want to share how to travel with kids, come up with basic tips, then break them down and tackle each age group separately. Someone traveling with teens isn't going to benefit much from an article that recommends keeping Dora DVDs and cheerios on board, and your two-year-old probably isn't up to working a Sudoku puzzle just yet. Make each article or blog post cater to a specific demographic.
Beyond age groups, think of tips to make traveling easier with a two-door, SUV, pickup truck, etc. The more specific your topic is, the less competition you'll be facing, and you'll also be giving the reader who is searching for that information exactly what they want, without having to wade through what they don't.
I've provided a very basic example, but it can be applied to any topic area. Don't write about 30-minute meals. Write about 30-minute meals for the diabetic, the vegan, gluten-free, low-carb, for picky eaters.
Divide. And conquer.