They have a lot of positive effect because something which is beautifully written and sensible expressed can actually have a soothing effect on the bereaving. Long funeral poems are very difficult to get through without plenty of support and practice and choose the poems you want, not what everyone else thinks you should read.
Going through some of the funeral poems with friends and family members really helps, some of the poems may make you laugh because they are such the complete opposite of the person you've just lost that you have a good laugh about it. People who attend funerals must be aware of the proper etiquettes to be observed during this time. Make sure you are happy with it before the reading, the last thing you want to do is decide that it's not that appropriate on the day.
If you know the person very well and you would like to write it in your own words about that person, you could do that too. A Celebrant will honor a family's wishes and will present either a religious or non-religious gathering. It is, in fact, acceptable to include humorous moments in a eulogy.
So we believe that there is a brighter and wider home beyond death, a new way and place to live after we die. It is a tribute, do it justice.