Spacing and making a list

3 questions really:

1) My category list spacing is very close from the last thing in the previous category to the category title below it (see screenshot attached). Can I add padding or something to make it space out a little better? If so, where and how?

2) When users can create a list, they can only create a list of things that they have already reviewed. That sort of defeats the purpose. If they are planning a trip to New York, they want to collect exciting places to visit in New York on a list. Is there a way that a user can collect “favorite” listings in a specific place?

3) Is there an add-on or anything so that when a new listing is made matching criteria, the user will receive an email of the new listing? Like a watch list. If they are watching New York and specify that, they will get an email anytime a new listing is placed in New York.