Depends what you are training for...
If just to get fit then ride ride and ride again, but if for a specific race or races it depends on distance terrain etc etc.
I always had a training plan of sorts when I was a runner, based on what events I was doing at the time.
EG. Sun Long run
Mon easy 5 - 8 mile road run (7 min miles)
Tues track session 10 x 400 in 70secs (min. rec)
Wed 6 mile steady off road run (7 1/2 min miles)
Thurs Club road run 8 - 10 miles (6 min miles ish)
Fri very steady run or rest
Sat race.
That would prob be an early season week, weeks would change for tapering for races or sharpening up.
Winter would be mainly steady mileage building up an endurance base.
Not been biking long enough to advise on bike, but I would think the principals similar.