USAGE and word choice
University of Victoria (great campus!) usage guide
Cohesion devices: logical connectors a.k.a. signposts a.k.a. connectives,
BTW: explore this site – it contains good things but the navigation doesn’t tell you much.
USAGE and style guides
The Economist magazine has a free style guide; although it is simple, it is solid.
Grammar Girl web site and podcasts (despite the name, a serious contemporary usage resource)
MIT’s ComDor Editorial Style Guide
Writing Technical Articles
Strunk and White’s The Elements of Style online
The Coventry University Harvard Reference Style
Journalistic style: the 4-box system
You can ask questions at Stackexchange:
Google ngrams are a pretty cool tool:
1. Fantastic! Three great concordance samplers which can access the biggest and most famous corpuses (including the British National Corpus) are:
British Academic Written English concordancer
British Academic Written English Corpus
2. Make your own concordance! Laurence Antony at Waseda University made Antconc, a free software for making your own concordance.
3. Google can be a simple concordancer too: