Hello. I currently use a Kryptonite Fahgettaboudit Mini to lock my bike. The way I transport this lock is that I just lock it on the top tube on my bike. However, which I'm riding it has a tendency of shifting forward and every time I ride over a bumpy surface, it keeps clanking on my top tube. Any suggestions on a good way to transport my U-lock? Any recommended u-lock brackets? Thanks!

That lock is too heavy for a bracket. None of the hooks that Kryptonite makes will fit around the shackle of the lock. Lock it through your rear rack if you have one, else put it in your bag.

I transport mine on my rack:



Of course, I only use one pannier and the lock is not a mini, so its own weight keeps it in place.

If you don't use a rack they you can mount it on your handlebars like this:



BTW that's a Lockblock from https://www.twofish.biz/bike.html

The twofish bikeblock (that irclean linked) is what I use when I don't strap it to my rack.