It doesn’t matter if you were not regular on brushing and flossing previously. You can always start anew after fillings. This will maintain and improve your oral health and strengthen your fillings even further. The key is to brush and floss after every meal. Remove any and all food stuck between your teeth and make sure to remove those lingering tea and coffee stains. Try cutting down on your alcohol and tobacco intake as well.
Consult your dentist/oral surgeon on a frequent basis. If you experience any pain or discomfort, discuss it with your dentist as soon as possible.