I only get razor bumps when I actually grow my beard out. I have a process for shaving especially when it's kinda long (clippers, face wash, lather brush, shave once with the grain, re-lather, shave against grain, lotion). I cut out the clippers and re-lathering on a regular day though and I'm usually fine unless I'm too lazy to replace the head on my razor (fusion proglide - recommended) or am in a rush (leads to cuts). I try to shave every day, but some days that's easier said than done on some days.
I've used Art of Shaving products before, and they work great. I have a friend (really thick, fast growing beard) who uses their safety razors and other products.