Here is a useful page for you from BBC Gardeners world.
http://www.gardenersworld.com/what-to-do-now/
When the page opens you will have a calendar which you can look through then for every week through the year it gives you hints of what you should be doing for either of the following main areas.."Flowers", "Fruit & Veg", "Greenhouse" and "Around the garden" each area can then be clicked through to get more detailed info.
Experienced gardeners may not need this, but for gardeners of lesser knowledge like myself...its a useful planning aid and memory jog.
Steve...
Maybe this is useful enough and could be pinned here?