Several years ago I bought a walking foot and 1/4 inch seam foot for my Brother 120E (a very basic machine) but both feet sat in the drawer with other gadgets for 2 years until I forced myself to use them. I can't believe how much they simplified my quilting life!!! No longer forcing fabric through the machine -- the walking foot just chugs along dealing with everything -- I love it, and the 1/4inch, but still make mistakes with that. I've just searched ebay for the magnetic seam guide someone mentioned earlier -- might give that a try too.
cheers