* When getting on the Autobahn, there will always be a "Beschleunigungsstreifen" or acceleration lane. Use it to get to speed while watching the traffic on your left (while signalling, needless to say), then merge in.
* When getting off the Autobahn ("Ausfahrt", ha, always on the right (with < 5 exceptions)), there will be 3 beacons with 3, 2, 1 white stripes on a blue background indicating 300, 200, 100 metres to the beginning of the deceleration lane. Start signalling at the 300m sign, and do not slow down until you've changed onto the deceleration lane (as otherwise you'd force those behind you to slow down & reaccelerate).
* As mentioned, do not overtake on the right. However, if the highway splits (or at an exit), the broken white line dividing the lanes will change: wider and with shorter gaps. Here, one may overtake on the right.