There really aren’t any tricks to it, it just takes practice. It's just like learning to read books, the more you read growing up, you start to recognize words and reading becomes fluent. Same with reading music, the more you read music, you will recognize large chords and progressions in the treble and bass clef and it becomes fluent. If you can read 1 note at a time, continue to do so, figure out chords 1 note at a time and continue to read. It will get easier in time.
I was going to mention those Docdb, I've heard many variations, but to me it's just more things to remember rather than just getting acclimated to reading the notes that are right in front of you.