When using a version control system, such as Git, commits are quick and cheap.
I like to make small commits as often as possible whilst working on a task.
For example, when doing test-driven development, I commit my changes wherever the tests are passing or after a refactor.
Each commit is a checkpoint I can easily roll back to if needed.
I've never regretted making a commit, but I've regretted not making one.
Commits are cheap, but debugging without a recent commit is expensive.
