Contrastive learning is a good way to learn representations. It is similar to the way self-supervised learning is used to learn representations, but uses positive and negative examples.

• Jaiswal et al 2020 - A Survey on Contrastive Self-supervised Learning
• Le-Khac et al 2020 - Contrastive Representation Learning: A Framework and Review

• NAACL 2022 Tutorial Great tutorial

• Data Augmentation
• Self-Supervised Learning
• Semi-Supervised Learning