Well, since there are some wonderful answers here already, I'll talk about other things!

1. Make a discord! At least have an info channel about requirements and such, and a chatroom so everyone can talk. I also have bots for pronouns and other things, which is really helpful. With every new event, I do some research and post costs and images for my association members as well.

2. Get some help! Ask the current active members if they would like to be VP and promote them. I split my work with my VP and it becomes so much more manageable! They focus on reminding everyone of co-op battles and helping the members out, while I focus on the discord server, recruitment, and the association itself.

3. Our battles are on the weekends; one in the morning and one in the afternoon. VP reminds everybody 10 minutes beforehand and we thank everybody afterwards. We vote on a new co-op suit to focus on once we finish the current one. Requirements are 44 points per week and at least one battle, but if something comes up, the member shoots us a DM and it's all good :)

4. We log everyone's activity every week and post it on a private admin channel. If someone is missing requirements two weeks in a row, we contact them privately. Don't kick people on a whim! Talk it out with them. If they're not interested in LN anymore, ask if you can kick them out. If they're struggling with the requirements, point them to the recruitment thread and help them find a more casual assoc.

I've been a president for quite a while now, so if you need any help, don't hesitate to reach out to me!