Organize your work
Once I reorganized into three categories, everything flowed easier, and I found I could (almost) easily post three times a week.
If it's too difficult to fit reading and writing into the same day (or maybe your also trying to edit, or even promote a book you already have published), prioritize your days. One day for reading, another for writing or editing, etc. If you need longer chunks of time, that's fine too. Maybe take a week to focus on reading--that's about long enough to finish a book. Then take the next week to focus on your writing, while you think of what you'd like to read next.
Set a schedule
Use work days
Don't "make" time, use waiting time
It's not about having hours to focus on your work. It's about taking advantage of minutes. Now go take advantage!