In reply to thebigfriendlymoose:
> bouldering near your limit is the most effective means of building strength / power / technique for the tough stuff, and the most satisfying way of filling all those indoor winter sessions.
I discovered, after about 15 years, that bouldering on a woodie/board is way better than using the bouldering room. It's far easier to have a productive session because everything's a strength problem, and you set them all at the right level of difficulty. The board I use just has terrible footholds, which teaches accuracy and makes you pull really hard too.
I've also had good results from doing 4x4 steep routes twice a week for about 3 months for stamina. I reckon that once I can do laps on 6c I'm about E3-fit for Pembroke style routes. Laps on steep 6c will get me up E4 at Lower Sharpnose, with the E3s feeling easy. But it won't help at all with anything that requires technique like granite or gritstone!
For trad, I've never found doing hard routes indoors to be useful. Onsighting a trad route is about as far removed as you can get from limit redpointing indoors - the requirements on the body could not be more different.