1. step forward one leg, lunge, jsut bring the back leg up parallel with your working/lunging leg, essentially working one leg at a time to keep the pressure on. IE:step fwd ten times on your left. turn around, step 10 times on your right, back to your starting position.
2. gently touch your knee to the ground, pause for "one one thousand count" while relaxing your leg muscle, then stand. will recruit more of the working leg, including the glutes on your lunge.