Two tubes and a patch kit. If you can't find the hole by eye or hearing the hiss, another tip is to turn the tube round by your lips and see if you can feel the escaping air. Looks daft, but can be surprisingly effective. Would also agree with keeping the tyre logos aligned with the valves - being able to work out where you might need to check the inside of the tyre for tiny sharps that have made their way through is really helpful. There's nothing more annoying than sticking a new or patched tube in and immediately getting another flat from the end of the thorn that's hidden in the tyre...
Two tubes and a patch kit. If you can't find the hole by eye or hearing the hiss, another tip is to turn the tube round by your lips and see if you can feel the escaping air. Looks daft, but can be surprisingly effective. Would also agree with keeping the tyre logos aligned with the valves - being able to work out where you might need to check the inside of the tyre for tiny sharps that have made their way through is really helpful. There's nothing more annoying than sticking a new or patched tube in and immediately getting another flat from the end of the thorn that's hidden in the tyre...