Re: Staying motivated
To give yourself something to look forward to, you could try adding some things to challenge yourself. For example, do a little demo at the start or finish of class, showcasing what you will or did teach be the class and related techniques. That will challenge you to go from one technique to the other, quickly and with precision, it will improve your Aikido and be entertaining for the students.
For example, if you are teaching techniques from Yokomen, then show a bunch of techniques from Yokomen attack.
You could enjoy some energetic practice with your students especially if there is an uneven number. You could call more line or group techniques and participate with the students.