What can I say instead of the f word?

I'm curious, could you provide some alternatives to using the f-word in conversation? I'm trying to be more mindful of my language and find more constructive ways to express frustration or anger. Could you suggest some phrases or words that convey the same sentiment without resorting to profanity? It would be greatly appreciated if you could offer some suggestions that are both respectful and effective in communicating my emotions.