1) Buy too many bulbs.
2) Pick a spot in which to plant some of these bulbs, and check that spot for daffodils.
2A) Does it have daffodils? Then create your hole by digging up and removing most of them.
2B) Does it not have daffodils? Then dig some up from some place that needs thinning and move them into this hole. (Now you have another hole in which to plant bulbs!)
3) Put the new bulbs in the hole. Plant the daffodils [back] in the hole.
4) Cover, water, repeat.