Are you tired of playing the same old boring 1-3-5 arpeggios? Well, you can easily revitalize them with one simple trick, just add the 9th interval of the scale. Adding the 9th interval can turn a simple arpeggio run into a rich splash of staggered harmony.
For example, converting a simple G major arpeggio (G-B-D or 1-3-5) to a Gadd9 arpeggio gives us G-B-D-A or 1-3-5-9.
Or with a C major (C-E-G or 1-3-5) to a Cadd9 gives us C-E-G-D or 1-3-5-9. To use a add9 with a minor just use a b3 interval.
Practice in all keys using both major and major arpeggio forms.