It seems to me you'd just do the same things that got you Expert status:
- Hold your line
- Ride predictably
- Try not to crash ;D
First year expert myself, but it will be my 4th trip to Daytona. I'm bumping up to a 600 (2006 R6) after riding an SV650 for the past few years. I know it's going to be a whole different animal, but I'm looking forward to it!
Staying positive is going to be key. I know I won't be running up front at Daytona, but I plan on having a blast battling for 12th or 18th place. Look for me, #980. Blue leathers, possibly blue bike, possibly 'primer bike' since getting 2006 R6 bodywork before Daytona is turning out to be...interesting.
As for classes, stick to Middleweight Supersport, Superbike, and GP -- I wouldn't bump up a class. I probably won't even do the Superbike race, since I'll still be getting used to the 600, and things will be fast enough in the Supersport class. If I remember correctly, the Graves Yamaha factory team showed up at the CCS races last year, so expect to get lapped by DiSalvo (at least once) at some mind-altering speed...