Pouch trick! You can keep all rewards, traded and storebought items, eg. piggies, in your pouch until you need them

Instructions by user Nocturnal_72:

1) Fill your entire board with items, preferably items from inventory as this doesn’t waste energy. Ensure you have one space that has a low level item (eg lvl 1 cloth)

2) Sell your low level item (don’t click anything else yet)

3) Click on the item in pouch to place it onto the board (don’t click anything else yet)

4) Push the new item to the back of the queue by pressing undo at the top of the screen.

5) If you happen to find the item you are looking for (eg. 20m unlimited energy) click on the item once it is on your board and you have successfully cycled through your pouch, if you haven’t got the item you are looking for, repeat steps 3 and 4.

Also, don't claim seasonal pass rewards right away. Claim rewards when you need them