Staying in Step????????????

So I have a horrible time staying in step in band. We have a huge competetion this saturday and i have been improving somewhat. I just dont want to lose points because i cant stay in step. I dont know what my problem is this year. I have always been amazing at marching and such. We dont high step march or anything i think he called it like a glide or something. Does anybody know how i could improve some more before saturday? I go in in homeroom and work on marching with some seniors. (im a freshman)