That looks like a good choice. Revell kits are typically easy to assemble, though the fit is not as good as Tamiya. Having said that, you won't find an early Mustang by Tamiya, so I'd say for a balance of detail and ease, you've got the right kit picked out.
As far as standard "to-dos"... are you talking about detailing or assembly tips?
For details, I usually will add spark plug wires if there is an engine, maybe some other wires, but usually I try not to get too carried away. I always add flocking (simulated carpeting) to the interior.
Make sure you test fit things; there will be some areas that need to be painted that may not be obvious while just looking at the parts. What comes to mind immediately is the firewall area and the underside around the transmission tunnel. This may differ kit to kit, so again, test fit before putting it all together for good.
As for painting, remember to spray in thin, light coats, building up the color gradually. The site I used as a guide when first trying to improve my paint jobs was www.italianhorses.net. Alex Kustov has some amazing paint jobs and some great tutorials of techiques that really work.
I stick with Tamiya Lacquer Sprays (TS-xx) they are very forgiving and turn out very glossy out of the can.
Hope this helps...