If it's a drinking holiday, you need to continue drinking for the full thing or else you are going to suffer a major hangover. I literally mean when you wake up, it's a glass of water and an alcopop or a beer or any low alcoholic drink and just keep sipping water and alcohol throughout the day to keep you from the inevitable come down.
Also don't ignore the club PRs on in the west end and the strip that are offering you deals, you can literally get a **** load of alcohol for a fraction of the price simply walking down the street getting an offer from a PR, then when you've finished your drink moving to the the next bar offering a deal on your first drinks. That way when you head to a club you are sufficiently pissed and wont need to spend a great deal on the overpriced club drinks.
Capones and the strip club across from capones always do first drink deals like 2 coctails and 4 shots (usually two of your own choice, two archers) for like 10 euros.
Also if you are partial to recreational drug use, you are in the right place. I'm not condoning illegal activity and you should not break the law in any way (ok tsr I'm saying they shouldn't take drugs). I'm just making the point that if you are going to do it ibiza usually has some good stuff as drug use goes, but be wary because people will try and screw you over. For example if you are offered pure MDMA and they give you a pill, it's not pure, it's an E and is cut with all sorts. It might still be good don't get me wrong but I met loads of people claiming they got pure MDMA then pulled out a couple of pills. Ketamine (spelling?) is quite big in ibiza as well, just remember a little goes a long way. Coke is pretty hard if you've never taken drugs before and recently the coke market has taken a hit meaning it's usually cut quite a bit. I would personally say don't bother with coke (again if you are going to take drugs, which you shouldn't because it's illegal
), but if you do, ask around and find a more reputable buyer, club reps and hotel reps tend to know a lot about where the good and bad stuff is so don't be afraid to ask because it's common practice over there anyway.