How should I study chess tactics? - Quora

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Grandmaster Guide to Learn and Improve Chess Tactics

100 “Clearance” Chess Puzzles for Advanced Players (Rating 1500-1800): 100 real-life chess tactics puzzles to make you a better player (Chess Puzzles, and Tactics - Clearance (Clear the Square)): Puzzles, Mr

Chess Tempo is working on having - Killer Chess Training

Just broke 1900 on chesstempo! Started playing 15 months ago and this resource has been extremely beneficial and I would credit as one of the biggest factors in my chess growth. Results

Playing to Tactics rating comparisons

Perfect Chess Trainer – Apps on Google Play

The Reloader! - Chess Forums

New site in public beta testing

New Mastery Course: Using Time In Chess