Whenever I come to a stop I just unclip my left foot and wat until I stop to unclip the right foot. Then I throw my right foot over the bike. It really is not good for your bike to unclip and put all of you weight on the pedal to get off of the bike.

As far as standing up. That took me quite a while of practice. I practiced a lot on my MTB before I got my road bike. I rarely standup on my bike but if I have to gain speed I can.