Gear wrenches. They make any tight space a lot easier to deal with. The short ones are even better than the standard ones. I love my Snap-On set.

1/4" drive ratchet and a 10mm shorty socket and a 10mm deep well for timing cover bolts.

Impact wrench for the crank pulley (nothing else is as easy as an impact wrench for this, I've had no success with anything else, but that's only because I have access to air tools).

Several cans of 2+2 carb and choke cleaner to clean the timing cover with.

Rags.

A gallon of antifreeze.

RTV sealant (orange or red stuff is fine). Use this on the water pump gasket. Makes life easier when installing it.

Breaker bar for motor mount bolts.

Drain pan for catching your antifreeze.

Floor jack to jack the engine back up so you can re-install the motor mount bolt.

That's about it. The crank pulley bolt is always the same size as the lug nut wrench on Hondas and most other cars. The timing belt tensioner is spring-loaded and supposed to set itself, make note of where the spring is connected and that it goes back exactly as it is. If I were you, I'd replace the timing tensioner pulley. It's a $35 part from the dealer, but well worth not having to go back in and replace it before needing your next timing belt if it starts failing... or worse, have it seize up and snap your belt/hose your motor. Don't use carb cleaner on your timing cover unless you have compressed air nearby. That stuff eats through plastic, so you'd want to blow it off of the part ASAP. If you do, then it's fine. Carb cleaner eats through paint and powder coating, too.

If your valve cover gasket is already leaking oil, now is the time to replace it.

If your cam or crank seals are leaking oil, replace them or else.

If your radiator hoses are in rough shape, now is the time to replace them.

If you haven't replaced your accessory belts, or if they're cracked, replace them. If your accessory belt tensioner pulley is noisy, feels gritty as it rotates, or doesn't spin freely, replace it.