Do you see patterns in your highs and lows, Chinu? You might have to do some tweaking of doses. If you are having problems with your post prandials then you should consider altering your I:C ratios. If you have problems with your fasting, in between meals and at bedtime, then you might want to tweak your basal rates, giving yourself more or less for different time zones.
I agree with Gerri, if you are eating a lot of carbs that makes it harder to get predictable results.
Try making some small changes in diet and insulin dosing and see what happens. Perfection isn't much of an option for most of us, but we all have room for improvement!