In reply to DreadyCraig:
Personally, I would set a goal of getting out on rock more. In fact I've set this goal for myself, because if you don't go for it then it's easy to never hit real rock when you live in the SE. But looking at where you are, you can be in Swanage in a couple of hours and southern sandstone in about an hour.
So my first training would be in the noble art of cadging lifts, sharing the driving and paying petrol money. Or, if you are already motoring, then it's all about finding partners, getting up early, doing day hits, driving whilst knackered.
The second training would be the somewhat less noble art of junking other things in your life in order to go climbing. Whittle away your time restraints.
Sorting out that little lot and getting more time on rock will help a huge amount. Then I would remember: we don't climb grades. We climb routes. So, aim for some routes (which might be the magic grade you want to climb). That's a little more inspiring, as you can stick a picture of the route on your wall or at your desk, and think about doing it. It will also give some focus to your training.
Finally I'd plan some trips - go to the Peak, or Cornwall, or Font, or Buoux, whatever turns you on. That will help give you the motivation.
And yeah, all the guys suggesting giving up top roping, doing dumbbell complexes, and all that. Follow their advice too.