minor key signatures handy guide Theory Things   William Wieland
sharps:3456012
 f  c  g  d  a  e  b 
flats:4321065

Explanation
        f  c  g  d  a  e  b 
Write the order of sharps. Eventually, this is all you will visualize.
sharps:012
 f  c  g  d  a  e  b 
A minor has zero sharps. E minor has 1 sharp. B minor has 2.
sharps:3456012
 f  c  g  d  a  e  b 
Continue counting on the other end. Add "sharp" to each letter.
F sharp minor has 3 sharps. C# minor has 4. G# minor - 5. D# minor - 6.
The order of flats is the order of sharps backwards. Number flats backwards.
sharps:3456012
 f  c  g  d  a  e  b 
flats:43210
A minor has zero flats. D minor has 1 flat. G minor - 2. C minor - 3. F minor - 4.
sharps:3456012
 f  c  g  d  a  e  b 
flats:4321065
Continue counting on the other end. Add "flat" to each letter.
B flat minor has 5 flats. E flat minor has 6.