Complete revamp, cold turkey?!

I've led a very unhealthy lifestyle for many years!.
Excessive nicotine, caffeine, alcohol and red meat, and far too little sleep and exercise!.

I still don't have any health problems, but I'm out of shape, and need to get out of this!.

When people make serious lifestyle changes with regards to these areas, do they normally go:

1!. Cold turkey!?
2!. or make Gradual changes!?

I'm looking for permanent change!.Www@Answer-Health@Com

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