I'm a bit haphazard I'm afraid. I find these training schedule thingys impossible... how do you add 10% of a ride ..go round in circles? and the weather varies the effort so much. I tend to stick at the same routes for a bit and then make the effort to find longer ones. It's probably better to plan but I have to go with the flow otherwise it gets too stressful.
Apols, Im a bit of a statto geek. I just love measuring improvments in distance/speed/hill climbs whatever. Thats just me!
Haphazard is good; I find you achieve more that way anyway!
I don't stick to any kind of a strict schedule; its more I'll generally just aim to complete a 30 miler this week, 40 the next, 50 after that or whatever. If I do miss, well never mind, at least I completed x, its another one under the belt regardless, the weather/diet-prep/late-night/hangover was probably a factor in why, I'll hit it next time.
I guess in some ways I'm lucky in this regard; I tend to "out-and-back" rather than "loop"; I'll aim for a point I know to be 20 miles away or what have you with the intention of getting there, turning round and coming back; which then gives you your 40 for example. Doing it this way means I can either push on a little bit further than my turnaround point if I'm feeling good at the half way mark, or alternatively vary my return leg to be a bit more indirect so as to add on another few miles; that way if I do over cook myself at least I'm still on my way home.
Although the image of just cycling around in a tight circle at the end of my street just waiting for the odo to tick over has tickled me for some reason.