Have a throw-line in the craft, making sure it is secured to a canoe seat. Carry a bailer and a sponge for removing excess water in the craft. Tie them to a brace. Have a whistle or other hailing device to call for help. When the weather is bad, or the water is running high, is not the time for canoeing.
Some waterways are canoeable year-round, while others offer only seasonal floating.
Avoid crowded waterways by canoeing on weekdays. You don't have to invest a lot of money to go canoeing. If you have your own craft and gear, that's great. In picking your paddle, the best length is generally one that reaches your chin when its tip touches the ground. Paddles ARE important.