Try using sus 2 and sus4 triadic arpegios ideas....
Bbsus 2...Bb, C, F
Bbsus 4...Bb, Eb, F
also try Bbm 11... Bb, Db, F, Ab, C, Eb
or R, b3, 5, b7, 9 and 11
try using Bb aeolian minor, also known as the pure or natural minor scale...
spell....real important!
Bb, C, Db, Eb, F, Gb, Ab, Bb
or R, 2, b3, 4, 5, b6, b7, R
also try Bb aeolian minor harmonization in triads... Bbm, Cdim, Db, Ebm, Fm, Gb, Ab
spell these triads!
also try Bb minor harmonzation in 7th chords...Bbm7, Cm7b5, Dbmaj7, Ebm7, Fm7, Gbmaj7, Ab7
spell these 7th chord arpeggios!
This kinda stuff goes on and on...
Hope that helps ya out...
Let me know if you need more?
FA
Palm Beach, FL