Hi - I can relate to all of the responses and in particular the affect a yard and people can have on your confidence. It takes a lot of energy and focus to block out negative energy and why should we have to? Why not surround yourself with positive, supportive and encouraging people? They do exist.
I'm not the bravest rider in the world. I've been riding most of my life but since having children I don't have the nerve and carefree attitude I once had. This makes me frustrated with myself because I know I can do it. A year ago I bought a lovely irish gelding and I know the people at the yard would gossip about any little incident I would encounter with him (such as my horse spooking at a car, being a little too fat, being a bit unbalanced because he's still young, my riding ability, the fact that I didn't want to wear spurs, the odd buck). I wasn't the only one though and I witnessed nasty assessments of other riders and their horses.
I moved to another yard and and am now surrounded by supportive people who are there to help. Environment is really important to me because I know it has a real affect on me and it's not something I need to take on board when I trying to work with my horse and progress his training. My old yard didn't get Ground Work either and it is a great place to start if there are issues and even if you don't it's still hugely beneficial. People at the old yard used to say "You should be this - you should be doing that". You need to do what's comfortable and not feel pressurised from judemental peers. There's no rule that says you have to ride your horse 6 days a week, trotting, cantering and jumping. If, after a fall all you want to do is walk round the block then that's exactly what you should do.
On my journey of regaining confidence and positive mental attitude there were a few things that really helped me. Firstly articles such as this one on confidence http://www.hoofon.co.uk/feeling-the-fear-410397/. It made me realise that so many riders suffer with confidence and how important conviction and attitude is. I found a really good trainer who also trains the rider's mental state and focus and enabled me to be more "in the moment". As she says - when you're not in the moment, that's when things are likely to happen or go wrong.
I moved yards to be around supportive people. I also attend a confidence clinic which was really beneficial and I got to work with practitioners who could help me with my specific issues. I also subscribed to Jane Savoie's confidence sessions (DVD pack) which has proved really beneficial and she provides a range of tools and techniques to help riders. And there are lots of sports psychology books out there that look at NLP, visualisation, EFT, thought stopping, relaxation techniques - these all can help.
I've also changed my view on what I consider a brave rider to be. A brave rider isn't necessarily someone who has a carefree approach to riding but rather somewho has a fear or anxiety who keeps coming back the next day to tackle their issues.