You can undo commits in Git using various methods depending on the situation, such as resetting to a previous commit, reverting changes, or discarding changes entirely. It's essential to understand how to use these methods effectively and safely to avoid losing work or causing conflicts in collaborative environments. The `git reflog` command is particularly useful for recovering lost commits, while `git revert` can be used to undo pushed commits without altering the commit history. To manage commit history efficiently, it's recommended to use `git reset --soft` instead of `--hard`, and to regularly back up changes using `git stash`. By following best practices and understanding how to handle complex Git operations, developers can ensure their workflow remains efficient and error-free.