Originally I tried to recognize intervals by ear through the use of songs (e.g. m3 = first two notes in Greensleeves). This worked until I got to m6-M7, where the songs I had for downwards intervals didn't really stick. So I started recognizing them by humming out the downwards interval, then the upwards one back to the first note (e.g. m6: C-E-C).
This is working, but it feels like a 2 step process, when I should actually try to recognize them right away (e.g. m6: C-E). Am I handicapping myself with this method? Or will I eventually start to recognize the downwards intervals without having to go back up?