Set an alarm on your mobile device so you always remember to log in every day without missing a day. Doing this will earn you a daily bonus which increases each day as long as you do not miss a day. When you have have logged in for five successive days you will earn a very large prize which is worth the effort and wait and then the process starts all over again.
Energy
If you are close to leveling up but out of energy you can visit neighbours by tapping on the 'Main' menu and selecting 'Social'. Doing this will earn you XP points and increase your energy meter.
Energy Cost
When you are placing a new building or animal in your kingdom you must remember to factor in the cost of energy and how much XP it will earn for you.
Love Items
If you look at your love shack, you can craft many love items such as pink fur, pink stone, and kissing dust. This is especially useful for the love caravan.
Neighbors
Always visit your neighbors daily and help them out as this will earn you coins and XP which will level you up faster and unlock more items for you to buy with the coins you earned.
Selling Items
Only sell back items as a last resort to get coins or if you really don't want it as you will only get a quarter of the purchase price back. If you used gems to buy an item you will not get gems back when you sell it.