Flashbacks - How to do them

[seren_ccd]

I have a question for all the writers/readers on my flist. Do any of ya'll have a good example of flashback used in either lit or fic? Or let me know how you feel about flashbacks. Some people can't stand them and I'd love to know why.

I've hit a bit of a block and am having trouble finding a seamless way of inserting flashbacks. I know I've seen good examples, but am drawing a complete blank.

Halp?

Virtual slices of pie to anyone who can help a girl out.