When I re-wired mine i made some simple mistakes........
Remove the old harness completely, label all your connections if you're unsure of your skills. That way later if you need to you can remember where that wire went etc...
Take pictures of any switches and plugs that go on them.
Very easy to do.
Remove any wire chase covers etc.......
Go purchase a billon wire ties......lol
Mount the fuse box first! I didn't, figured I leave a little wiggle room later to mount it...... big mistake
Gather all the wires that go to the back and loosely wire tie them togeather, do the same for the engine, dash area, drivers side etc..... starting at the fuse box start tucking, bending, wrapping around corners etc......useing wire ties every 4-5 inches, pulling them snug, as if this were their finial resting place. Then and only then start making the terminations for all your gear.
High quality crimpers are a most for a good looking crimp,
Lowes sells them for about 25 bucks.