Realise that, by starting a thread on this, you are opening a massive can of worms... There's little consensus, hence the various techniques such as POSE / Chi etc all disagreeing on some points.
If you adapt to FF strike, realise that the adaptation takes longer for some people. Some people seem to be able to change over in a few months, others get injured. The 10% rule cannot be breached if you change over - i.e. never increase running load by more than 10% in consecutive weeks.
Some common traits which Pose / Chi and Pirie all agree on:
NEVER let your cadence go below 180 strikes p/minute. Elite runners typically are above 190 (and this is relevant to mere mortals, since elites have the largest training loads). Get a metronome if necessary.
If your Sunday run is currently say, 10 miles, when you change over, go down - literally - to 3 miles and build up by 10% p/week. Injury can strike without warning - often when you feel invincible. Be patient and cross-train if you need more cardio.
Calf strengthening is a good move (calf lifts with dumbells). Foot strengthening (Google 'foot gymnastics') is also a good move, as your metatarsals / extensors will not be used to doing so much work.
Whilst I'm not an advocate of one strict discipline, make sure to regularly do drills. Pose drills are useful, as is high-knees, butt kicks etc.
Changing your gait is the biggest single change a runner can ever make. I'd advise taking advice from anyone who says otherwise with a pinch of salt.
Make sure to Google for Gordon Pirie's free book: 'running fast and injury free'. It's a few yrs old, but I've yet to find a mistruth in it... He didn't have the science we have today, but his empirical evidence / experience is difficult, if not impossible to disagree with.
Let's say you're fit enough to complete the race (say a 10k), but you've lost a month of training, so you know you're at least 2-3 mins off PB potential. Do you race? Do you do it simply as a training run? Or do you hate the idea of collecting a poor result, so volunteer to help at the race, go back to training and only race once fitness is regained?
I'm just curious. I guess the more competitive guys probably don't race unless totally fit. Those who are more into the fun aspect will.