Always find the sword in Fabris’s 3rd, trying to do it in 1st or 2nd is hard. (There is note later saying that 4rd is the proper guard for finding the sword.)
When in third, look through the forte rather than the debole. The forte is better for protecting the head, which if you are in proper guard is the only target.
Make sure to square the hips while in guard, this makes it easier to attack.
Keep the weight on the back foot, it significantly affects your ability to move.