Middlegame, Planning and Study

1. How To Improve Your Chess series by GM Gregory Kaidanov
2. Aron Nimzowitch's My System as a Video Series
3. The Legendary 15-Minute Drill by IM Daniel Rensch
4. How to Analyze Your Own Games by IM Daniel Rensch
5. How To Analyze Your Games by GM Igor Smirnov
6. Improving One's Capacity To Improve, Part 1 to 4 
7. Chess.com Study Plans for Intermediate Players: Strategy
8. Chess-Skills.com Tips and Advice for Improving In Chess - http://chess-skills.com/tips-and-advice-to-improve-your-chess/
9. 10 Golden Rules for a Chess Player by GM Irving Smirnov - http://chess-teacher.com/wp-content/uploads/2013/12/10-Golden-Rules.pdf
10. The Road to Chess Improvement in 10 Steps - from Chess.com post
11. Download positional evaluation checklist based on Karpov and Mazukevich's thought process - http://beginchess.com/wp-content/uploads/2006/11/positional_evaluation_checklist.pdf 
12. Chess Visualization Training Video, Part 1 
13. Garry Kasparov's top 8 sacrifices
14. Fighting For Initiative: Chess.com Video by GM Melikset Khachiyan
15. 7 Elements of Evaluation of a Position GM Melikset Khachiyan -  http://www.chess.com/video/player/evaluation-and-planning---part-1
16. Becoming a Strong Chess Tournament Player Part 1 & Part 2
17. NM Dan Heisman on roadblocks in chess development - http://www.chesscafe.com/text/heisman23.pdf
18. NM Aww Rats Chess Lessons - https://www.youtube.com/watch?v=f4uI5vSkaYU
19. Youtube Videos by Chess Mastery - https://www.youtube.com/user/SearchChessMastery
20. Kotov's Training Method - http://www.chessmastery.co.uk/articles/the-kotov-training-method/
21. Pre-Tournament Preparation - http://www.chess.com/blog/zkman/tournament-preparation-part-1-pre-tournament
22. How to use tactics in your games - Part 2 by GM Igor Smirnov - Part 1 and Part 2
23. 10 Greatest Middlegame Plays written by Yuri Markushin 
24. Developing Sense of Danger
25. Decision Making in Critical Positions 
26. How to consistently improve your chess by IM Jeremy Silman  
27. RCA Free Courses
28. Chess Tactics Medley Set 1 
29. 10 Things to Focus on for Reaching 2000 ELO 
30. GingerGM Method by GM Simon Williams 
31. Attack in queenless middle game - https://www.youtube.com/watch?v=WMYVDdf7cvI&feature=youtu.be