Hi and welcome to the site!
You're asking a pretty broad question and there's no real right or wrong answer as there are so many different ways to achieve so many different things!
Have a look through the WIP section and try searching the forums for 'display board' etc. that might turn up a few things. I know Mertall has done some nice display boards in the past if you look through his WIP but there are many, many more
There have been some really nice entries into the diorama challenge so if you have a look through these threads (and maybe at the entrants WIP threads) you might also get some tips:
viewtopic.php?f=96&t=29059viewtopic.php?f=96&t=27295I've only ever made one (see pic below) and I documented it fairly well, if you're interested then check out page 12 of my WIP below, in three separate posts I go through building the house, the trees and the board itself in some detail:
viewtopic.php?f=50&t=25596&start=220I hope that's of some use, looking forward to seeing what you come up with!
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viewtopic.php?f=1&t=29569