It is also important to mix up your daily rides. You should not do high intensity rides every day, or even consecutive days. Very important to mix up your daily plan and have rest days.
If you try to ride fast all the time, you'll end up too tired for speed. You'll be able to maintain a decent pace but not really be able to put out the power when you want to.
Yep, SK is right. I don't ride that hard every day. More like every other day.