TIP #1:

During PT, the more happiness you have, the bigger point bonus you'll get for each crate you fill (Market, Planes, Ships). During GT, happiness doesn't matter much. You can store away your decorations and replace them with Level 1 production buildings to help complete guild projects faster 

TIP #2:

A good housing tip is to stick to 3 houses until very advanced in game. Instead of using up your valuable spaces and building materials for unneeded housing, focus on upgrading those 3 houses and most importantly, your TOWN HALL for big boost in players & happiness. You will have more spaces now for other items like fields, cow sheds, bakery, Pine Farms etc.. This tip is for all three Islands. 

TIP #3:

During GT, always plant Carrots, Cotton/Yarn, Iron, Feathers & Ground Coffee when logging out for the night. The next day, hold them so we can do our tasks for quicker GT points.

TIP #4: 

Learn your number of items when they are ready to harvest. You can click on all of your fields & product buildings when they are in the works(not when ready) & it will tell you how many yours produces. These numbers will grow quickly on most items so you'll be updating them frequently as you level them & upgrade. We often ask if members have a certain item & teammates answer with item name & the amount that they have ready for harvest or the item name & how long before they are ready.  

TIP #5:

You should ALWAYS have everything on your island producing products/produce you will need. Especially your cow feed & flour(windmill).

TIP #6

For quick money when in a pinch, both goat feed & breakfast sell for good money.