Perfect displacement activity here - I should be working 
... I really welcome this thread, though!
A couple of years ago I started riding again after a looong break (20+ years). During time out from riding I'd hacked a bit here and there and then done some beginners polo, which made me realise I had to do something to be back around horses generally! I missed everything - including bringing in on winter nights, stuffing haynets, the lot.
I started off with weekly lessons: good instructor, nice horses to ride. The worst bit was how horribly out of condition I was physically: I couldn't get my body to do really basic schooling stuff, worst of all was how weak I was around my core - and that was after having done quite a bit of pilates over the past few years and finding it not too difficult!
I looked around for shares, and found a couple (more of that later), went as far as contacting yards to ask if they wanted an extra pair of hands at weekends (like a teenager, I know, I know... also found out how I was no longer up to mucking out 2 stables without feeling as if I would collapse
... And I say this as someone who exercised regularly and thought of herself as quite fit).
Early sharing experiences weren't great. There seem to be a lot of owners out there who want someone to ride horses that they've given up on after having let the horse get away with anything - said horses often very unfit, curious behavioural issues, possibly through health problems, possibly lack of proper schooling and decent management. But they won't tell you that that's why they won't get on their own horses. All quite odd if you're feeling your way back into the horse world and riding.
Eventually loaned a horse for a few months. I don't still have her, but found out quite a bit about my local riding world, met some fab people, possibly starting another share soon - through a friend rather than web searching. Really excited about that.
It's taken quite a while to find riding friends whose horse management I'm really comfortable with, but I've got there! 
I've found that a lot has changed - not all of it for the better. Horse owning seems to be a lot more 'consumerish' - with lots of owners forking out for tons of fancy stuff: multi-coloured rugs, magical massage numnahs, fancy feed supplements... for horses that do little more than potter around the block now and again... those sorts of things. At the same time, owners and riders who really know their stuff (even real basics of safe handling), get on with basic essentials (keeping tack really clean, schooling regularly and properly, keeping horses consistently working fit) seem rarer than they did in the past. Which is odd. As have been brushes with Parelli fanatics and that kind of new fangled flummery. But I'm getting there and really enjoying it. And I do need to ride a few times a week so as not to feel like an uncoordinated sack of potatoes.