After you finish a cooking task, don't immediately sell what you made. You may need them later in some selling tasks.

After buying another acre, don't immediately clear the rocks and the bushes. There are also tasks where you have to clear them.

Plan your planting. Don't overplant, as your barn will be full in no time. You don't have to have too many Wheats or Tomatoes, they grow rather easily.

It's better to move forward with your recipes than to make all you need first then making the final recipes later (e.g. when you need white sugars and you only have three slots, it's better to make white sugar whenever you have enough brown sugars than to complete your brown sugars first)