Glue has always been a woodworker's friend. It's been around forever, and it just keeps on getting better. Of course, until it dries, modern glues are among the slipperiest compounds known to man. Keeping things aligned 'til the glue sets up is one of the big problems with edge joining anything. Just ask any woodworker that's tried it.
A quick fix for this is something that acts as a mechanical alignment aid, typically either biscuits or dowels. Biscuits are quick, easy, and adequate, but biscuit joiners start at $200.00 and work their way up. A cost effective alternative is dowel joinery. With a street price of around $50.00, the Dowl-It Jig is quite cost effective. And, it's darn near foolproof.
Personally, I use the model 2000. It has a couple of "standard" size wholes pre-drilled, but it also comes with six screw in bushings that can be rreplaced if the originals ever get worn. The bushings are broken down into three standard size sets of two each. It's handy for drilling two dowel joints side by side. The 2000 will open up to a max width of two inches. It's a good all-around unit for a hobby woodworker. They sell others to fit more specific needs if you need it, and they're all around the same price, give or take a few bucks.
Dowels aren't the strongest joint out there, and they won't eliminate all of your alignment woes. But, the do add strength to simple joints and aid in joint alignment. They're perfect additions for light, quick joinery. And, as one can see by perusing the extensive one page Dowl-It Jig manual, it ain't hard. Give 'em a try.