There are million of topics about which you are not master to write but you can still write about few of them. Most amazingly you can write more about on the topic that fascinates you, about which you like to talk for hours because you are interested to talk about that and never feel boredom in doing that.
However there are few of the topics about which you can write and share with your readers.
1. Personal story
Everyone has something to share. You have also that. Personal story does not mean so much about personal but it does mean to share about your life lessons, your experiences, happenings and activities. Those things can be one from which other can learn lessons or apply your techniques in their different life situations and that might help them in doing so.
Each of us have different mindset and as a result we also possesses different opinion on different things from others. Different people have different political, religion and cultural views. You can share your opinion on variety of things whether its about education or fashion etc; because everyone has freedom to speak but keep in mind while sharing your opinion try to never attack personally on others.
Answer the expected frequently asked questions in a post or in a FAQ page. It will save the time of yours as well as your readers.
Everyday trends of variety of things changes like fashion trends. Write about in line trends and also share which trend you are in to follow up.
A most common thing that you can also do; so start writing reviews of books, movies, or any other product or services that might help your audience to choose from.
Give yourself a challenge in your writing. For example; choose 21 day tasks to do and on completion of each task write about it on daily basis.
7. Make videos or podcasts
Create a variety of creative videos showing your work, passion etc or helpful videos that might give few beneficial tips to your readers.
8. Series writing
Choose a topic and break it into parts and deliver it into series to your readers.
9. Create campaigns
Create a contest, giveaways etc and offer a prize to one entry that you choose randomly. Or create awards.
10. Resource list
Share a list of resources you use, tell about your partner companies and vendors etc.
Give your feedback, re blog or share it, follow for more inspiration.