I think we all go through "dry spells" as far as places to hunt. And sooner or later you're going to run into someone else with a detector, also.
One of my favorite spots is a local school complex, and I'd have sworn two years ago that I'd cleaned it out. But something new always pops up there, last time it was some of the front area of visitor-side bleachers having been cleaned up (vines, small bushes, ivy, etc) that allowed me to get my coil all the way from front to back and side to side under the bleachers. I was expecting maybe half a dozen quarters, a few dimes, maybe 20-30 coins total but I ended up with 39 quarters for a total of 152 coins just in those new, small areas I was able to reach. I thought about putting my sniper coil on but didn't end up needing it.
You may simply need to expand your hunting area, also. I prefer to stay as close to home as possible since gas is over $3/gallon here now, but I've starting turning in my found clad to fund longer trips away from the house. When I stray further from home (still within 40-50 miles) I sometimes make out very well and sometimes get absolutely skunked. That's the nature of the beast.
As far as competition, REAL competition is hard to find when you know YOUR machine like you should. It used to bother me seeing someone sweeping a machine over an area that I wanted to hunt, or had hunted in the past. But so many times I've stopped and chatted with the person and discovered that they don't have a clue what they're doing, that I no longer worry about it. I've tried giving tips when asked, but of the four people I KNOW of in this area that use a detector there's not a one of them that goes out more than once or twice a year. I believe two of them have quit altogether, they just don't have the patience to "dig pennies all the time", "have to make a gigantic hole just to find a penny" or "can't find what's making the machine beep". I posted a couple weeks ago about another new guy with a machine under "Ever meet Mr. Metal Detector... who isn't?" and that's about the size of what I run into around here now. I've gotten to the point where I LIKE to see someone else with a detector working a place over, because it might deter someone else with a machine from checking it out. It sounds counter-intuitive but that's the way it is. Just keep common courtesy in mind, for instance I never invite myself to hunt with them or pull out my machine and start going at it until they've left.
Steve