Basic tips: check everywhere for ammo/weapons/cyber modules/consumables(food/cigs/etc). Collecting other non usable items in a single location is also a good idea for if/when one find a recycler(makes nanites out of such items).
One can also hover their mouse pointer over things(people/animals/non obtainable items/etc) for various descriptions.

On Urlaub: this FM can seem a bit more tricky as it doesn't have as "linear" a path through some of the areas like the previous 3, so I will do my best try to keep my advice/directions as clear as possible for those who might want to make use of it. This FM is a bit shorter and different in tone than the previous 3 FMs(more silly than serious, with a holiday planet theme).

"Hidden Cutscene": you can shoot the NPCs in the game for a little cutscene, but save your game beforehand as doing so ends the game and sends you back to the menu.

-

Well, we arrive on a nice little vacation arranged by the brass to show appreciation for all i've done(like kicking Shodan's posterior 3 more times). So far, so good....but will it stay that way, I wonder?

1st pic: my quaint and stereotypical arrival....complete with luggage covered in travel stickers. Now what I wanna know is, where did the protag get those stickers? Did he have em made or what?

Doesn't matter which way ya go, into the building or down the path, as you then go to:

2nd pic: the beach, nice and relaxing....and boring. Better be some action soon.
3rd pic: one of my rooms...i've made it up in case I have guest....oh who am I kidding, I never have guests *solider starts to cry a little*

(weapons) In one of the starting huts you will find a pistol(in the luggage), and in the other hut is your starting melee weapon.....a broom(on the floor). You will also find some food items in one cabin, and you can also "dispose of" the fish in the water for food items as well. Then simply head to the path to find.....some craps!

4th pic: Yes, the crabs are hilariously mis-named. Dunno if it was intentional by the dev or not, though....still, funny either way.

(items/ammo) From the path split, go left to the beach to find some ammo in the water...also pick up the basketball as well(I forget if it's useful later, but it might be).

Further on down this path is another beach where we come to a nice little bar tended by a nice enough fellow named Claude, which has a radio playing a nice little familiar tune(my fellow LucasArts fans should be able to tell which song it is just from the first few notes).

5th pic: (also items) I asked Claude if he had any job openings, as this place is a wee bit boring. He sadly said "nope". Behind the bar is a nice container of nanites, though.

Pic 6: Once you've had you fill of the beach(including watching Alyx prance around in the latest "twitch fashion"), you can go back to the initial path split and head right towards the visitor center. You will come across two huts near a pool of water.

(items/ammo) In one hut are some bullets, and in the other are some cyb modules. There is also another audio log(first was back in your hut near the start). From there, you can head down the path further a bit until you come to another path split.

Going left, you come to yet another path split. To the left is Hartmut Beach, and to the right is the visitors center. Hartmut Beach sounds like fun, so the soldier goes there first.

Pic 7: These folks look happy...don't they look really happy? Wonder what they're having, and where one can get some.

Pic 8: (items/ammo) Near some plants in one corner of the beach is some ammo, and if one is realllly careful, they can get around Hartmut the shark and swim into a tiny cave to find some loot near a not so lucky beach goer.
*note to self: buy more beach insurance*

Pic 9: (items/ammo) Going back at last to the visitor center area, you meet Lulu and her sister(who are probably trying to sell you some knickknacks at exorbitant prices). Past them, you find the visitor center. Inside are a bunch of things to collect, like: nanites in trash cans, cyber modules in a bathroom locker, ammo in the upstairs kitchen, and hypos in the medical bay.

(upgrade location/med bed) Across from the medical bay(which contains a med bed for healing) is also the first upgrade station. While yer here it'd likely be best to upgrade your character as you see fit.

After upgrading his skills, the soldier goes back to the path split (the one underlined above), and goes right. After
borrowing" a tasty steak from a grill near a sleeping tourist, you go into a rather spacious hut.

Pic 10: (important item/ammo) This hut is very important to visit, I think, as not only is there ammo and cyb modules(under the beds of two tourists), but there is also a recycler

Strolling a bit further, you will come upon a beach with yet another shark(this one not as lively), and your objective will change. What lies next in store for our hero, I wonder?