There was some discussion here about flat face to flat face glue ups and the slip-n-slide that can bother us. Probably more than one of us has used or at least heard of this method.
I'm building up a small pedestal base like the unfinished and unglued one stacked up in the background. I pre-sand the surfaces that will be hard to reach later like the small chamfers and recesses.
I drive in very small nails and snip them off with a pair of side-cutters leaving just a nib poking up to grab the next piece. Whether you use 2 or 3 or 5 will depend on the size of your surface. You may notice the darkness on the end grain left from my wiping with mineral spirits to check for sanding marks and assure I've got the surface I am after.
I clamp a piece of scrap in the vise to use as a reference surface to align the backs in this case, spread the glue with my customized Rockler gift card glue spreader and stack them up.
The little spikes on the top of each layer (except the final top surface of course) keeps things from slipping around while I tighten down a couple of cauls.
Gently now, don't crush the little fella.