After giving it a lot of thoughts, I settled on sketching a random, out of context comic panel everyday. Just a simple sketch with pencil on paper, to make sure it can be done without much preparation each day. I usually do it right after breakfast and I've been keeping on track for 18 days now.
This was my "choose your project" worksheet. I settled on just little panels instead of full comics, because a panel can be anything from highly detailed to very simplistic, in case I was having a bad or busy day and couldn't give the project more than a couple minutes.
Here are some examples of what I've been doing so far:
As you can see, I decided to include how I was feeling that day and what the weather was like, because I wanted to know if those things impacted my art. I also included little notes on what went well that day and what I was considering to maybe draw the next day.
And there you have it! I hope to be able to finish the 100 days and improve my sequential art skills. I feel like I have learned a lot already, and it hasn't been super hard to stay on track either. I think it was good advice to keep the daily objective simple and flexible enough so it can be done in a short amount of time. I am sure, I will be able to complete the 100 Day challenge as planned.