May I suggest that one thing to watch for is that you don't bend the brake discs. This is really easy to do.

If you have a car wheel and tyre assembly handy, it'll be really good to rest your bike wheel on during the operation.

Also, when you've re-fitted the tube inside your new tyre, inflate it just enough so that it'll hold its shape. This makes it harder for you to pinch the tube.

Personally, I don't use any lube fitting tyres. But that's up to you. As Petenz said, the big secrets are keeping the tyre bead in the well (even if that means rubber-hammering it every bite of the lever), and taking small bites with those levers.

You can spend a fortune on tyre fitting gizmos. The best gizmo is experience, so have a go!

Good luck.