If you do not wish your posts to be VISIBLE TO EVERYONE, you can select the option 'visible only to members of this community' before you post. This is worth considering given the personal nature of the type of posts that we often see here.
When replying to a blog or question, check the privacy setting - if it is visible to everyone then your response will be also.
Please remember to add tags so that others searching for information can find it easily and in some cases prevent duplicating questions.
You can find older posts by entering keywords into the search box on the top right corner.