Tricks you learn along the way...oh dang!!! I have a ton of that since I was cutting all my pipes with a miter saw. Thanks for the tip!
I've done a massive amount of plumbing since joining the hobby. Plus I'm on my 2nd basement finishing project.
Another tip is to always use primer. Add it to the pipe first paying special attention to the cut outer edge, then do the fitting. With the glue use the same approach, pipe first hitting that edge good to melt the PVC, then do the fitting and assemble fairly quickly. If you apply the glue to the fitting first it has more time to melt the PVC in there while you're applying it to the pipe and your going to be more prone to getting that winkled mess pushed back into the fitting. This will reduce the diameter in there if it doesn't shrink up as it dries & cures or if you don't clean it out. It also creates a snag point when hardened. Sometimes there's no good way to reach in there to clean it out as you get closer to the end of the run.