I have a '94 Civic with a D16, and my name is also Roger.
Stuff that I learned about racing a single-cam Civic, in order of importance:
1. Oil temp, know it, keep it under 250. This is #1 by a long ways. Use good oil, change it every race.
2. Do not let it overheat, ever. Know your water temp, have a warning strobe for it. It will blow a head gasket quickly if it overheats.
3. Keep revs low or the sleeves will walk. We dropped our rev limit by 1000 RPM. An $80 block guard will also stop the sleeves from walking and eating your head gasket.
4. Do not let it run lean. Know your AFR. We keep ours at 12 at WOT, which is rich, but I think not too rich. Never run it out of gas while racing. Blox Racing makes a kit to modify your stock FPR for under $40. Several companies sell wideband kits, we use the one from Glowshift.
The stuff that skivittlerjimb said is also really good stuff.
We use a full-width Integra radiator, which required a big hammer, a cutting wheel, and some long zip-ties to install.
Check your bushings and wheel bearings/axles often.
Start shopping CL for your backup engine/transmission, have them ready.
Check your subframe and steering rack bolts at least annually.
Find good teammates who will pay their share on time, turn wrenches when necessary, and not beat up your car.
Have fun
Good luck
Everybody grab your brooms, it's shenanigans!