I want to start blogging, but not quite sure of different topics to blog about weight loss. Naturally, it's going to be about my own journey, but in general, is there a place that suggests topics?
Catch 22. If there were a site that suggested topics to write about, everyone would write about them, so they would no longer be good things to write about (because they'd be as common as dirt). You're far better off writing about your experience and whatever comes to mind when you're thinking about weight loss - nutrition, life changes, challenges, how to get through the really hard days, etc. My 2c.
Well first of all you have to filter topic and relevant keywords on which you are going to write blog article. For blog article suggestion you can use Quora to get broad idea about it. Once you decide your article topic then you can use Buzzsumo or portent to get article's title idea.
You may want to check out this site: http://www.impactbnd.com/blog-title-generator/blogabout I have found it quite useful for helping me come up with blog topic ideas.
Try one of these methods to find great and new content ideas http://www.turninbound.com/how-to-find-content-ideas-for-your-blog/