Experience
For a good amount of experience points, make large amounts of what are called baked donuts. You can earn 63 experience points by doing so. Independence cakes will get you even more experience points and either choice only costs 350 of your coins in the game.
Money
To make a good amount of money, sell a lot of lemon meringues. Sharing them with friends will enable you to get extra portions of these creations and you can achieve 1895 coins in profit for every serving. You always will get more money if you then share with more friends.
Ovens
The ovens can be an issue in the game because you will have to move around when you are baking. The trick to deal with them is to block them off, which can be achieved when designing your layout. The game allows you to block them off regardless of the floor decor you've chosen.
Layout
When designing your layout, create separate sections for the different aspects of your bakery. For example, separate the cashier area from the area where customers sit. By dividing the areas you can manage other things, such as your waitresses who will be in the seating area and not working near the counter if you don't want them doing work in that part of the bakery.