Alt (better) order of memorizing modes
IMDAPLoLy
Ionian, Mixolydian, Dorian, Aeolian, Phyrigian, Locrian, Lydian
Typical order of memorizing modes
IDPLyMALo
C, D, E, F, G, A, B
Order of flat/sharp additions to modes from their majors
Mix - Lo: b7, b3, b6, b2, b5
Lydian: #4
Ionian Alterations
None
Mixolydian Alterations
b7
Dorian Alterations
b7, b3
Aeolian Alterations
b7, b3, b6
Phrygian Alterations
b7, b3, b6, b2
Locrian Alterations
b7, b3, b6, b2, b5
Lydian Alterations
4