Doors can be a real PITA. Eastwood has a tool that hooks to the door latch and the pin on the B-pillar. You stick a breaker bar on it and it allows you to tweak the door without loosening the bolts. This is for fine adjustment, not big changes. For more than a 1/4" you will be better off loosening the body-side hinge bolts a bit and lifting the door up or down.
The hood is a little easier IMO. If it is a small adjustment, trace the mounts with a marker and loosen the 4 bolts on the side that needs to go in or out. If it is a big adjustment, you may need to loosen both sides. Just don't get it back too far or else you'll start snagging the cowl every time you open and shut the hood. If the hood is a little bent in the middle from some GI standing on it or if the glue between the frame and the skin is failing, it will make it tough to get it perfect. Have fun