I've been stretching quite a lot lately due to having 5 weeks countdown to grading for my 3rd Degree BB. My stretch routine was simple, as often as possible run round my block (takes about 5 mins only) do some dynamic stretching and then do 3-5 sets of box splits. I started with dismal results but eventually progressed until I was doing it in my socks (not a great sight) on a laminate floor for the extra slip, and am now only about 8 or 10 inches away.
I graded on Wednesday just gone and failed! Not flexible enough and my opponent wants another 6 weeks to train so I could not do my fighting either. I grade again in 6 weeks and I will be ready. No doubts this time, I must be positive!
Train hard and act as if you like it!