As a brony/pegasister, you may have found out about this cool game. Not that it is so much different from any other farming game, except for giving us the chance to play with our beloved characters. Which is cool.
However if you are also a gamer, you may not want to just buy your way through the game, but to actually play it. More than play it, optimize the way you play. Not that you shouldn't support the developers, which you totally should, just that let's face the challenge first!
Step 1: Never buy bits, convert gems instead.
If you are going to buy your way up the game, however you look at it DO NOT buy bits, buy gems in stead.
You may notice that bits go from 1909/$, to 2850/$. Meanwhile, gems are 10/$ to 15/$. This means the ratio between bits and gems is 190 bits/gem all over the range. Now, if you look at the Bookstore, you will notice that with three ponies you can skip Books for 1 gem, getting you 385 bits and some extra random loot in return. That is 385 bits/gem... + loot.
You wouldn't want to pay twice that by getting bits directly, and loose on the loot, would you?
Bonus tip: if you are tight on bits, and have some gems to spare, this will also let you get some bits the fast way.
Step 2: Tap the pony in the box
You may be going crazy, trying to find this little critter. You may have also figured it's none other than our playful Derpy, hiding in a cardboard box, somewhere on the map.
When I say "somewhere", I mean literally somewhere. She can spawn on the open, behind a tree, on a night section of the map, behind a house, or on a dirt road.
You may need to look quite closely at the whole map to find her. Even get into the editor and move some houses around, to find out where she is hiding.
Step 3: Move your bonus ponies around
In order to claim the bonus bits, you only need three ponies when the timer runs out. You can leave just two (or one, if you are going for the one-pony produce) the rest of the time, as long as you add a third pony before the timer runs out.
This means that if you don't have enough high-star-level ponies to three-pony-fill all your shops, you could just rotate a single, or a few, ponies from shop to shop as the timers are about to expire. Just don't forget to have a third pony before they do actually expire, or you will lose your bonus!
Bonus tip: you can pause a produce timer by selecting the other produce. When you go back to the original one, the timer will continue from where you paused it.
Step 4: Don't wait to mine
Tired of waiting on the timer for wheels to run the mine? Don't!
You can get a wheel as random loot from any shop, so the fastest ones (Windmill, Cherry Stand and Lemon Stand) will give you a higher chance to replenish your 5 wheels sooner, but also any other loot has a chance to give you a wheel. That is, elements of harmony at their monuments (if you keep your map clean of parasprites, you don't really need more than about 10 of each), and best of all: every decor item. Just click on it, sometimes once, sometimes twice, and you will get some bits, and sometimes a wheel.
So if you want to get wheels much faster than through the mine timer, just plant a forest. Or a line of trees. You can use whatever decor you found on the map, or you can buy some new, as long as it is clickable (dust roads don't work). Then, click it all one by one. It has some cooldown once it's given you loot, and I've found that going to another part of the map and coming back in a while works best to reset it.
In any case, a minute or less of clicking will probably give you the 5 wheels you need to run the mine again. Then again, and again, and again.