A very controversial subject. IMO the most important thing to do is vary your speeds for the first 100-200 miles; don't cruise at a steady speed for extended periods. No WOT starts. You don't have to (or necessarily want to) baby it, but you don't want to flog it or lug it (lugging is another controversial term--for some fifth gear at anything under 80 is lugging it, but for the purposes of this response lugging will be considered operating at a low enough speed for the load that the engine will not run smoothly).