The only way your exp bar moves, is by gaining levels in your skill trees while you play. So I've maxed out all my sneak/archer's primary skills (Archery, Sneak), and the secondary ones have all gotten up around 90 (One-Handed, Block, Light Armor), and peripheral skills that are easy to max have all been maxed (Lockpicking, Pickpocketing, Blacksmithing). Other skills with significant amounts are Speech 80, Enchanting 62, Alchemy 50, Restoration 43.
I have no perk points in Ench or Alch, so they are pretty much just dump skills that I've occasionally worked at just to help level.
But, even if I dilligently work at collecting mats and items and working those two up (oh god, the tedium), and jumping off cliffs and healing to get Resto up (oh god, the more tedium), and slowly but surely getting my secondary melee skills up (damn, they move slow once you get past 90, no matter how much fighting you do), I still don't see all that effort and tedium getting me much past level 60, if even that.
I still have about 20% of the map to explore, and plenty of quests still to do, and haven't even really done much of the primary questline yet- but questing doesn't get you levels, by itself. Oh, I've already done Blackreach and the quest line that gives you +5 skill levels to your chosen branch... long ago. If I'd known how hard it was to get your secondary skills max-leveled, I'd have waited till they were all 90, before finishing that quest
So, I'm having a really hard time believing anyone actually gets maxed out to level 81, or anywhere near it, without some kind of mod, exploit, or cheat. Am I right? I'm looking mighty hard at a mod that raises the skills cap from 100 to 300, as I'm betting that's the only realistic way to ever accomplish that goal. I'd be interested to hear from the people who've reached 81, to see how they managed it. Be honest

I made it as far as 50 and got bored with Skyrim, and moved on to another new game. I could not fathom how an individual could play this thing to 100 ??? Even if you are retired, and games are all you have. I would still have to move on to something more new and exciting ! 
http://www.jayzar.co.uk/#aG0000a0IWB1|yly0081Y2IO001S000E0Um000k0