In reply to phja:
I'd drop one stone, not two. Then see how healthy/fit you feel (irrespective of climbing performance).
Combine this with power training, ideally on 45% boards. If you can't do this, then go for more general bouldering. If you can't do this, do pull-ups - but mind your elbows.
Combine this with better technique (e.g. we can all have better footwork).
Combine this with learning about redpointing.
The result? As long as you avoid injury (be patient!) your redpoint grade will probably go to F7a or higher - possibly much higher.
Translate these gains into a higher onsight grade on sport routes and (careful here!) a higher onsight grade in trad. Go for steep, pumpy and safe for grade breakthroughs.
Hope this helps. It worked for me.
Mick