I recently ran the Boston Marathon and was destroyed on the hills. I went out like a maniac and then crashed after the hills started at mile 16. I ran about 20 mins slower than a marathon 2 months prior to Boston and walked a lot during the last 10 miles. I had done no hill work at all during the winter, just long slow stuff to lose weight and gain enough aerobic fitness to run a qualifying time for Boston . I thought I could "fake it" but running fast downhill and loafing uphill; wrong concept!
I've tried hill bounding in the past but I tend to go nuts with it and end up destroying myself. I'm going to work on a more reasonable approach and use #1,2, and 3 as you noted. I just love to sprint uphills but I have to exercise some moderation. My plan is to do a long slow warmup (about 20 mins.) and then gradually work into 1, 2 or 3. I think I can incorporate them into my daily long runs if I'm careful. These 3 exercises are really about developing technique and anaerobic ability. Most of my good times came when I was lucky enough to live around and train on big hills. Thanks