server - Is there easy and safe way to resize /boot

My /boot is full. Is there an easy and safe way to resize it?

I saw a discussion which said that /boot partition is not required. A /boot directory will be fine. However, I don't think I can have /boot folder while /boot is mounted.
Similarly, I can resize /boot because I can't unmount it.

I plan to
1. create a new logical volume,
2. mount it and copy all files from /boot to this new volume, and
3. change mount table to mount new logical volume under /boot.

Since it's /boot, I won't be able to boot if I make mistakes. Could anyone give me instructions?

Steve