In reply to climbwhenready:
The first thing is to make sure that whatever you do, don't get injured and just have fun, enjoy your climbing and don't get too caught up constantly wanting to improve - it won't always happen.
To be more helpful though, you should try a mixture of bouldering, for power and technique and then routes for stamina and route technique.
My climbing involves lots of bouldering in the winter, with short periods (1 week) of routes that I can onsight fairly easily to keep some route fitness.
In the spring I start to do more routes and less bouldering. That will consist of perhaps 2 climbing sessions (outdoors weather permitting) where I will do lots of routes onsight and quick redpoints i.e. fell of on the onsight and get it first redpoint. I will then have a couple of sessions where i work a harder route over 2 or 3 days and then redpoint it.
By then, hopefully, the better weather arrives and it is, for me, mainly routes.
That seems to work for me, but is not very scientific or goal oriented. I just kind of go with the flow and how I feel at a particular time. My technique is not going to improve significantly any more and it is all down to fitness, endurance, head and holding off the ravages of an ever increasingly older body as I shuffle ceaselessly towards the end of this mortal coil.
Rich.