Best way to start this journey??

Hi everyone. Can anyone suggest the best way to prepare for this cleanse? I.e.: should I spend a few days before the cleanse eating just fruits and veggies...or should I spend a few days just having light soups?? I know there is no "written in stone" way to begin, but I was just hoping to hear what may have worked for some of you who have successfully done this cleanse. I did it a couple of years ago for 30 days...with no preparation. I think it was just sheer will power that did it for me then. However, I have failed miserably with each attempt since then...hence my asking if certain preparations before the cleanse may help. Thanks in advance for any advice!