preservation

hey! i need some help. i found a dragonfly awhile back, it was dead. but i would like to preserve it somehow. its still intact and looks cool. i dont know how to keep it looking nice though. do i use a spay to seal it? how would i preserve it in glass or something similiar? im not sure what my options are and what i need to do to!!! any suggestions? or any help would be much appreciated!