Fiat's instructions are to not use full throttle for extended periods when new. Personally I was a bit more cautious - no full throttle and no more than 4,000 revs until I hit 650 miles, then gradually increased the top revs and used full throttle occasionally until I got to 1,000 miles. After that it was thrash at will.
It hasn't done any harm, uses virtually no oil - less than 200ml in 2,300 miles.
There aren't really any gearbox running in instructions, but light use at first would probably be a good idea until it beds in.
Brakes - treat with caution as you would new discs and pads for the first 100 miles or so again.
You will notice the engine become more free revving as the miles pile on.