My Honda has 190,000 miles, original everything.
Recently we noticed a small oil leak near the timing belt, my mechanic is going to pop her open and replace the timing belt, front crank seal, aux shaft seal, belt and retainer, camshaft seal, oil pump gasket, all rockershaft o-rings, valve cover gasket.
I have already replaced the drive and serpentine belt, brakes, roters, and one bad wheel bearing myself.

My question is, I don't want to have to pay for him to open her up again in a year, so while he's in there, what else should I consider replacing/upgrading to keep my beast on the road as long as possible?
Water pump, tensioner, sparks? Would love the opinions of some seasoned Honda enthusiasts!

 

Valve cover gasket should come with spark plug seals so, go ahead and do the plugs too.

Anytime you do the timing belt you need to replace the tensioner (I don't care what Honda says, they're not going to pay for a new engine when the tensioner goes in the next couple of months) and waterpump. It's cheap insurance.

That's a lot of miles for the oil pump, might want to replace it also.