Congrats on the features, clearly you are on the right track.

Every day is filled with topics, just takes time to write them down.

About what to blog about next

Way to go!  Keep up the good work!

write what you know.... that's the most reasonable answer.... if what you know and how you create that content is feature worthy, bingo.... the harder you try to please, the less likely you will be to garner a feature...just relax and be you....if you did it twice, you can do it 200 times.... blog away..

we usually write best, the best content , when we keep it to what we know best and like to share about.

Blog about something that is dear to you and will engage the audience.  It is helpful to include pictures and hyperlinks.  Do include your picture, contact information and a call to action.  Make sure the headline draws the readers attention.

Make a list of topics, post on a nearby wall and throw a dart and see where it lands. 

Congratulations of your success with featured blogs.

Sometimes, serious content is not necessary. A blog about a favorite recipe will be popular but will not be featured.