In reply to Jordangask:
Without a doubt the most important thing that gets people reading a winter climbing blog is conditions reports and regularity. If you're out climbing a few times a week and regularly blogging just before the weekend you'll get more people interested.
There's a whole internet full of incredible writers that people just don't have the time to get into, being a good writer wont get people to read your blog, although it might get them to come back if they regularly visit for reports.
Having said that you're competing against a few guides that blog almost daily with some of the best local knowledge and conditions tips there are. If there's a regular guide blogging on ben nevis or the northern corries then people will probably go there first.
Esoterica might be more effective, information on the honey pots is prolific but there are less people out there seeking out the odd locations and routes. James' glencoe mountaineer blog gets a lot of readers and writes a lot about seeking out new winter lines and although he writes well anyway I imagine he'd have less readers if he only posted about doing Tower Ridge, Orion Direct, Savage Slit etc.
I think reviews and advice tend to be welcomed more if there's evidence of regular activity and testing in the mountains. Also, it's kind of obvious but succinct writing and lots of pictures will win over long prose and one picture at the end. We're all Daily Mail readers at heart!