I just try to get there with optimum time/effort efficiency. Uphill, either pounding up the short ones ASAP or "slogging" up the long ones at a pace that won't wear me out. On flat ground I cruise along at around 15mph. Downhill, I religiously coast whenever possible. When I used to commute on a mountain bike I was all-out in top gear the whole way, usually standing on the pedals much of the time, but this road bike isn't comfortable standing on the pedals so I don't do that anymore.