From what I understand of recent studies, the flossing is far more important. Brushing is mainly to keep the gums healthy, as the teeth, other than in between, are pretty much self cleaning. Also, should brush before meals or more than an hour after so the acids from the foods have time to neutralize; right after eating the enamel on teeth is slightly softened by those acids, so if you brush right then you wear the teeth further.
Personally, I recommend investing in an electric toothbrush such as the Oral-B pro series (the ones that have ultrasound and 3d motion). Not only do they have a timer to help you get the right amount of brushing, but once I started using one, my dentist always commented on how healthy my mouth was. My brush also has a water-flosser which I use with diluted Listerine, which seems to help immensely.
I started doing that two years ago and my gums are a healthy pink again.
Once in the Morn and before bedtime. I use the Hydrofloss.