There are plenty of great ideas and examples on this site whether it be demos, videos, etc. Plus great stuff on Codepen published by incredibly skilled people. That’s where I learn and get ideas from. If that’s not enough for you then Google is your friend.
@AdamHodgson, I won’t suggest anything to you. Specially something about blog which I have never done. Just put something together, describe what’s the purpose and post the link to it or put it on Codepen and I am sure you’ll get plenty of opinions or and advice from members.