Step 1 - start with a garland, and cut it in half (bonus - now you have a perfect amount left over to wrap around a lamp post!).
Step 2 - wind garland into circle size of your choice and wrap floral wire around at intervals to secure the loop (you can kind of strategically place and hide the wire with the needles). Hold it up to see if there are any floppy bits - like that guy sticking up at the top right - and secure those with wire.
Step 3 - attach a bow or embellishment of your choosing and hang it up!