Blogging time is short today, since I'm on a deadline to produce a couple of posters for presentation. These are for an internal hoe-down, unfortunately, so I won't be able to share the fruits of my labors with everyone out there in the readership. With any luck, though, they'll turn into public presentations/publications eventually, though.
As far as I'm concerned, posters are quite a bit harder to work up than a talk. They really should stand by themselves, for one thing, so you can't fill in any holes verbally. And narrative flow is harder: there's no chance to go back and re-emphasize or contrast with later slides, because the whole thing is sitting out there, with no guarantee of what order people will use to see its parts. (I find that narrative is one of my main weapons in a presentation, so going without it is always tough).
I care about design, too, probably more than I should, so a poster also presents complications there. If visual cues wander a bit from slide to slide through a presentation, that's not good, but it's not fatal, either. But when everything's up there on one sheet, the messages really have to be consistent: same fonts, same colors, same rotations, views, and angles, etc.
But at these times I try to remind myself of what happened to a friend of mine many years ago. She was working on a poster for an ACS meeting, and took it to her PI to look over. "Yes, yes, that looks good", came the word, "but could you perhaps take this part over to here? And emphasize this a bit more? And. . ." So she went back and made the changes, and took the poster back for a re-check. "Much better! Yes. . .but I wonder if maybe this part should be bigger? And did you find a way to include those results where. . ." Back for another round.
After another iteration of this, she caught on. She started taking an unchanged version back to the PI, and after another couple of rounds of seeing the exact same poster, it was finally pronounced ready for viewing. Saves time, saves effort - try it when you can!