How do you judge how fast you are paddling? Flat water, lazy river, etc... I'm still quite the novice obviously.
Never really thought about speed, only once in a while I may saying wow I'm going fast, or gee, I'm not getting very far. Most of the time I like to sit back and enjoy what is around me.
A backup plan is key. I set my goal, then come up with a likely worst case fallback and consider several options in between as well. I do this for paddling and backpacking.I agree, ChadTower. The journey is the main part of the experience I look for. I always try to have a backup plan in mind, which I continually adjust as I go along.
If the wind rises in my face (as it always seems to, particularly when I need to make time), or the stream is clogged up, or the fish are biting , or if a nap attack sneaks up on me after lunch, I try to allow slack or have an alternative (be prepared to spend a night someplace other than where I intended, for example).