You Olde Timers will know what I mean:

Take only what you'll need
Carry choclate
carry extra water
Take great food
Wear your best toughest clothes
Take the right tent
Take a good friend
Leave 90% of your gear at home
Take extra fuel and coffee
Use your computer to print detailed satelite photos and Topo maps of your hike. Mark GPS coodinates on each - for middle of lakes, peaks and waypoints.
Carry extra batteries.
Take the nicest sleeping pad you can.
Don't forget your medication.
Jim
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These are my own opinions based on wisdom earned through many wrong decisions. Your mileage may vary.