Make a Planting Calendar. Track what to plant each month with a simple ribbon organizer. Each ribbon represents a different month; use clothespins to attach seed packets that need planting during the month.
Such an obvious cloche - why didn't I think of this? You can cut the sheets to suit the size of your beds. I could do this with just a few wooden stakes between the sheets of ripple roof, and it'd be perfect to protect from hail or cold!