Things I trying a long time ago but never stuck with.
Play the melody note on the top and bottom of the chord. What ever chord you play in the RH the LH will play the same note on top of the RH chord.
This style is nice on organ
Only play within one octave. Meaning what ever chord you hit in the RH the note the LH plays must be in the scale octave of the 12 notes.
This forces you to learn your chords because you are going to want a thick sound.
I cant remember the terminology of which is which. Closed hands, Lock hands, Block chords?