What most naturally follows?

How to write an essay on how you spent your summer vacation
Look back on mementos you kept from the summer.
If you kept any souvenirs from your summer vacation-like pictures, plane tickets, or a diary-use these to help you with your essay. Looking back on your mementos will help you remember details from your summer, making writing the essay much easier.
These can also make nice visual aids if you are asked to present your essay. Make a list of the things you've done over summer vacation.