fighting a grappler

Im a little over 3 weeks out and im a standup fighter, im fighting a a bjj guy with just a highschool wrestling backround. I feel confident im my gameplan and ive been working a lot of wrestling and getting up. No I am not looking to make any drastic changes by posting this im simply just looking for any last few week advice and or principles/tips when fighting a ground guy.
Ive been working the obvious like keeping him on the end of my punches and assuming a more lower stance,also not standing infront of him.
Anyone else have ANY kind of knowledge or something that works good for you to avoid the takedown and get the ko?
Thank you

More of a mma type of question but since im looking to stand and get the ko im sure yous can help me!

BTW I have a boxing background and also a few years of taekwondo so my standup is pretty well versed is any of that helps with advice.