Sadly none of the plants you mention will flower again once the original flower has finished. Dead heading of daffs and tulips is a good idea. Just behind the flower the stem thins a little (easier to see than explain) that is where you can nip off the dead flower. Crocus need no such attention, unless you wish to. I would give them all a good feed with Miracle grow or Babybio or Maxicrop after flowering to build up the bulb for next season. If you want them to flower next year wait until the leaves have turned yellow before diggin up and storing dry in a cool dark, vermin proof place.