Interior trim coming off

I had some trim separate around the entry door.  I glued it back on with a construction adhesive and it seems to be holding just fine.  The brand I used was Liquid Nails Small Project Adhesive.  Probably any general construction adhesive would work ok.  I used a putty knife to squish it under the trim so I didn't have to take the whole piece off, but if you bought a tube for a caulking gun, you could squirt it underneath as well.  I held the trim tight agains the wall for a few minutes and the glue set up quickly.  The glue cleans up with water, so you can wipe off and clean up the excess with a damp paper towel.

I also have an 18 gauge PorterCable brad nailer and use it regularly to install window casings and baseboard.  A great nailer.  I used it to nail on the door trim in our Sonoma on the opposite side that I glued recently, but the aluminum frame around the door was a bit much for the nailer.  I ended up gluing it and putting seam tape over the failed nail holes to hide them.  Another useful tool for trim inside the trailer is a pin nailer that shoots 23 gauge pins as short as about a 1/2" and up to 2".  I use it some times in lieu of a clamp for gluing when it's impractical to apply a clamp.