If i was doing it all again--first off i would rob a bigger bank and round UP log book times.
Flying wise I would do more instrument cross countries with a safety pilot, more non precision approaches, especially NDB let downs as you will have a life time of those with airline base checks but ensure you do a variety of different procedures.
Ensure you can divert on an a-b leg without it looking like a wallpaper shop in the cockpit.
Ensure you can enter a holding pattern from any direction.
Ensure your airmanship remains top draw.
Practice non everyday items eg flapless glide apps pfls etc
Good luck