BioShock Infinite

If you are like me and forgot this achievement during your playthrough and you want to unlock it asap:

To get drunk you need to consume 2-3 alcoholic drinks in a short timespan, the fastest option I found was in a bar in one of the earlier stages, in the building where you will later obtain murder of the crows.
If you turn left as soon as you enter you'll see the bar, three bottles of alcohol are on the bar (2 wine and 1 unknown alcoholic beverage). Drink all of them kill the guys in the bar and repeat 2-3 times and the achievement should unlock ^^

-Something important for this achievement is that you can still use the machines TO UPGRADE YOUR VIGORS AND WEAPONS. So not all vending machines are out of bounds.

Also if you accidentally use a dollar bill vending machine you have not screwed up if you did not buy anything!

Hard Battles

Lady Comstock

One of the most effective ways of taking care of lady Comstock is by using your charge ability and Brittle Skinned (pants).

Charge at lady Comstock and the she'll take double damage for 5 seconds, in this period take a high DPS a weapon like the volley gun or the Vox equivalent and just spam it at her. I was able to down her in 3-4 salvos without dying.

Another strategy is using the return to sender vigor, if you upgrade it so it costs less Salt you are practically invincible. Use it as soon as your shield is down and throw the damage at lady Comstock. Remember to keep stocked up on Salt if you want to do it this way.

Final Battle

The last battle can also prove to be a challenge, a strategy that worked for me was utilizing Return to Sender to protect the coil while waiting for the songbird cooldown.

These where the most important points (or the points where I struggled the most) I hope you can use some of these tips!

Brittle Skinned

After the handyman tosses you and you almost fall to your death Elizabeth will end up saving you. Check the Gondola on the platform you end up on for a locked door, inside the door you will find these pants.