How to Win a Data Science Competition: Learn from Top Kagglers
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Bag of words * Feature extraction from text with Sklearn * More examples of using Sklearn
Word2vec * Tutorial to Word2vec * Tutorial to word2vec usage * Text Classification With Word2Vec * Introduction to Word Embedding Models with Word2Vec
NLP Libraries * NLTK * TextBlob
Pretrained models * Using pretrained models in Keras * Image classification with a pre-trained deep neural network
Finetuning * How to Retrain Inception's Final Layer for New Categories in Tensorflow * Fine-tuning Deep Learning Models in Keras
You can often find a solution of the competition you're interested on its forum. Here we put links to collections of such solutions that will prove useful to you.