Any ideas on making my garage lip smoother? I've tried rubber garage threshold rubber, but think I've made it worse. I have a slight incline when backing up out of the garage and sometimes causes the front lip to scrape.

 

I assume you mean the concrete edge? Get a grinder and grind it down, or hire someone to grind it. Not very expensive.

 

Try to go out (or in) at an extreme angle (90 degrees if possible) - nice and slow. I've also found that if I engage PASM the shock rebound is tightened up.