Yeah, what he said. Get a checkout and practice flights in the specific aircraft, airport and local area in which you intend to operate.
If it's steam gauges, practice partial panel approaches to proficiency (no AI, no HI). It's not hard but you need to practice.
When you get a radio call, remember that the PM will not answer it for you.
Try hard to answer radio calls with "Cessna XXX" vice "American XXX".
Don't flare at 75'. If you're bum feels like it's about to scrape the pavement, that's about the right flare.
Keep your head on a swivel.