You may want to floss more once you start. If you feel like doing more at that time you can do more. After consistently flossing add two more teeth to your routine. Before you know it you are flossing all of your teeth consistently.
Secondly, make it fun (yes really). It's boring, so I make faces at myself in the mirror or floss with my daughter.
Third, technique. Take a 20cm length, wrap around each index finger securely. Start in the middle of your two top front teeth and make sure you get every gap.
That's about it!