Nothing really major.
If i have bet a horse named Spot Thedifference (you know the horse well) and i am watching the race from home, it seems to give me good luck by watching it with it on 'mute'. He is 3 from 3 when i have done that
When i'm on the track, if i have bet a horse that i considered to be really unlucky and probably should have won (Horatio in the Dewhurst), i will not go near the spot where i watched that race from for the rest of the day.
Also, although i have done it previously, i hate betting a horse that has the same trainer/jockey combination as the horse that won the previous race. Unless i really think the horse has a massive chance, i just won't do it.
So, in other words, yes..... i am very superstitious