I always wear the same pair of socks and same pair of trainers to every home game. Yes, I do wash the socks between matches!
I also wear the CITY necklace Lostock Blue made for me every time City play, home or away.
We were given this season's home shirts for Christmas and wore them for the FA Cup 3rd round match, then wore this season's away shirt for the CC semi-final. I have worn last season's home shirt for every home game since, and I will be wearing it on Monday.
Also, we always get chips on the way to the match at Mon Colly's and will be on Monday, though that isn't so much about superstition, as about liking them and being hungry!