I will start with my newest supplement money and time saver.
I am a huge fan of the smart pak supplement system but their mark up is kinda high, so I make my own 'smart paks'. I buy the supplements in buckets and then once a month spend time to put them into the Gladware mini round tubs (about $2.50 for 8 of them) and put the supplements for each horse for 1 day in a tub. Then I put their tubs into the drawer with the horse's name on it that used to house the pricey smart paks. The tubs are reusable and easy to clean when you are doing your monthly refill. It has the ease of dispensing of the smart paks and also you can at a glance see when you need to reorder or buy more supplements. I also was not a fan of the automatic reorder thing with the smart paks.
Now this works great for me since I only have two horses of my own and it would complicate things a bit more if I had boarders.
On of the other things I have done is installed a simple horsey survalence system. It cost about $50 to install but I know can check on my girls from inside my house. This is a money saver because if you have been reading my other posts my girls got out a couple weeks ago and one of them now has over $800 in vet bills from that night.
Also, a time saver that I use is for the horses that doen't turn their stall into a pigstay I pile about a weeks worth of savings in the corner of the stall that they do not use. This way I have the fresh shavings right there in the stall when I get done cleaning it out.
I am interested to see what you are doing to save time and money. Also if you have tried something that is mentioned in the thread tell how it worked for you.