How about these for your top post?
LAST TILE FINDER
Useful to have, but do not spend gems on it. Later in the game it becomes available for coins.
CLEARING OUT YOUR CAMP
As you progress to higher levels, you will be allowed to go deeper under your camp and clear slots for equipment that are three and four high. As soon as you are able, clear at least three slots of each height. After that, clear whichever height slot you need to for the equipment you have.
This is because there is sometimes equipment offered for a limited time through special events that will only fit in a three or four high slot, and this equipment can be up to three slots wide. By clearing the space now, you will always be able to buy or collect this limited-time equipment. Note: You don't need to leave the spaces empty - you can put equipment there, and if you need the space, move the equipment to your backpack.
Some older advice suggests clearing all the four high slots first. This was due to some erroneous information on these boards.