another 2 cents worth...
just to be devils advocate here...the whole 3 weeks build or 3 month periodization followed with recovery has never made any sense to me. Our bodies are not on a time schedule and these just seem to be arbitrary - why not put together a plan with a specific goal and then test yourself and see if you are achieving it- ie are you riding more watts at a specific heart rate- if you are achieving your goal ( more watts at a specific hr for example) don't change anything keep doing what you are doing until you are not achieving what you want- then change it- ie add rest or focus on another goal.
an easy way to do this is a step test
if you have a trainer that measures watts - perfect
start at a 100 watts every 3 min increase wattage until you are 80% max.At the end of every 3 minute period- look at your heart rate.
If your training plan is working you should be riding more watts at a lower heart rate- if you are fatigued or need a change of plan you won't see a change or it will go in the wrong direction
If you don't have a wattage trainer ou can still do these step tests- you just have to watch your cadence more carefully- start in your easiest gear at a certain cadence- for the test to be reliable you need to to it the same every time - same cadence, same tire pressure, same gear..well you see what I mean.
I guess what I am trying to say is why not base your training progam on something measurable rather than some arbitrary # of weeks building then resting- you are an individual- make your training program fit you not the other way around.
(btw I know this is a huge change of thinking for most people but then again lots of people think that lactic acid build up is why they fatigue ( not true - so such thing as lactic acid..but that is a whole other thread)
Whatever your plan - be sure to have fun and good luck!
The cure for anything is salt water;
sweat, tears or the sea
Isak Dinesen