The lockpicking guide in the sticky is ********* It's half done, gives the wrong information, and complicates an otherwise simple process. It was written in 2004. It was last updated in 2005. If you're going to tell someone to read the sticky, make sure the sticky you're referring them to isn't full of outdated and irrelevant information.
For the 125-175 stretch, I took a cruise around the goblin area of central STV. I didn't even bother killing them...nor would you need to at level 53...you'd have to pretty much run directly through them for them to attack you, so just leave 'em be to save time. Just do a big circuit, starting at the lumber mill next to the river and go clockwise around the perimeter of the goblin area. Pickpocket every goblin you come across. When you come back around to the lumber mill, you'll notice a very small little house directly (as in...< 10 yards away) SE of the lumber mill. Inside is a locked box (I believe it requires 160 lockpicking). Pick that box. Pick the rest of the lockboxes (Worn?) in your inventory that you picked up on your first circuit. Start the circuit over again. By now, the pockets of the goblins you already picked will have reset and you can carry on.
If I'm not mistaken, the lockboxes you'll be getting from the goblins will go grey at 170. Just keep doing the circuit (free flash powder is always good) and by the time you get back to the little hut, it'll be able to grant you another skillup. (You can pick it until you're blue in the face one attempt after another, but there appears to be a cooldown after one pick that has to expire before you can get another skillup from it). Once you hit 175, you can start picking all of the Sturdy Junkboxes you've picked up along the way.
I tried following the Rogue trainer's suggestions on where to go to level my lockpicking, but the places I was sent to were crap. Slow, hard to find the lockboxes, spread out, lots of travel...bleh. The one place I found where lockboxes are incredibly plentiful were the Slag Pits in Searing Gorge. Awesome skillups there. Between the Sturdy Junkboxes and the footlockers all over the place, I got about 30 points to my lockpicking skill just questing through there
Picking pockets for junkboxes has been the source of the overwhelming majority of the skillups I've seen to date. It's easy, it's something you can do while questing (as opposed to making a specific trip somewhere looking for footlockers or spamming trade to pick boxes for tips), and it keeps you well stocked with poison supplies and flash powder (my rogue hasn't had to buy poison reagents since I was in my low 30s, and I just hit 53 tonight. I also have 73 flash powder that I didn't pay a copper for).
Even if there are numerous places with tons of footlockers, it's still more than likely going to mean a special trip to get to them. Barring all else, that's something you can do. I'd much rather just keep on top of my lockpicking as I quest/grind without having to limit myself to specific areas. Dwarves have it good for finding footlockers. For me, it was just a tedious pain in the ***.
Edited, Sep 13th 2008 1:00am by AureliusSir