Here's a few tips from someone who's resurrected a lot of old Hondas:
If it's been sitting that long, don't pull the front brake lever, at least until you get home. There will be corrosion on the brake piston and it will lock your front wheel and make loading the bike much more difficult. Once you get it home, you can easily disassemble the caliper, clean it all up and reassemble.
Check under the seat for the owner's manual and tool kit.
Clean the mouse crap out of the air filter assembly.
Remove the spark plugs and the valve adjustment caps and spray some Marvel Mystery Oil in there. Then go away for a few days. When you get back, with the plugs still out, spray in a little more oil and turn it over by hand with the kickstarter. Stop immediately if you sense any significant resistance. Then spray in a little more oil.
Drain the crankcase and add fresh oil. Turn the engine over a few more times.
Drain the gas tank. At the bare minimum, you'll need to drain the old fuel out of the carb bowls and add an inline fuel filter. You may want to reseal the fuel tank.
Add fresh fuel (use regular, not premium and it will start easier) and a battery.
You will need new tires and tubes.