It is imperative to keep a map or plan of the area to visit as well as a road map for the case of private car travel. There are a number of tourist maps published to date that can be ordered through the official tourism information website for San Cristobal de La Laguna or in the relevant tourist offices on the island.
With regard to clothing, from April to May to September-October should bring summer clothing, light and comfortable, plus warmer clothes for the evening or on nature walks.
During the winter months will require warm clothing lighter or heavier depending on the area of San Cristobal de la Laguna to visit, bearing in mind that on the coast temperatures are mild, while in mountain areas temperatures may be around 10 degrees. Footwear should be sturdy and comfortable, adapting well to the area, dates and circumstances of the voyage.
Also, anything you need can be purchased at Laguna.