tips on asphalt driveaway replacement?

A good base is key!! We just had ours redone... they removed the old asphalt including 8" of old base. they laid down a mix of process and ground up old asphalt... one rainfall and this layer hardened up pretty good... even the guys who came and laid down the new asphalt commented on this. I never sealed the old driveway (250' long) it lasted 23 years with a shitty base. Do your research with the company you want to do the job