Experience can be all-important, but there are exceptions. We've all met the co-worker, coach, trainee, or athlete that is on cruise-control - just going through the motions. They haven't done or learned anything new in years. They are just trying to get by, doing enough to collect their paycheck, enough to NOT get fired, enough to maintain their current, unimpressive performance levels. You see them in every field and every sport or hobby. Rather than redoubling or refocusing their efforts, they do what they know will keep them where they are - nothing impressive, mind you, but comfortable, predictable results.
Another co-worker or athlete we all know and love is the one who trains or works like gangbusters only to meet with miserable failure or injury... repeatedly. Cliche, I know, but sometimes it really isn't just about working harder, it's about working smarter. Athletes used to pushing the envelope in training are very susceptible to this - "It didn't work last time, but it HAS TO work this time!", "If only I can just do one thing right, the whole thing will fall into place." Recently, I had a young man correspond with me, asking for some training advice - the conversation went like this:
Young Man: "Everytime I've done Smolov in the past, I've gotten injured, but I'm stronger now. Do you think I should do Sheiko or Smolov?"
Me: "Well, if a program has injured you repeatedly, it's probably a good idea to avoid it."
Young Man: "So, Sheiko or Smolov?"
Don't allow yourself to fall into these blackholes of mediocrity. Take every training session as an opportunity to improve yourself in some way, no matter how small. Keep a training log and make every mesocycle a learning experience. Don't allow false delusions of "consistency" to excuse you from new (and needed) change.
Make your experience count for something besides 'X'es on a calendar. Make your journey worth more than a conservatively counted hill of beans.