Lets definitely talk about this. Im new to PLO and my biggest leaks are postflop but I found that the quickest leaks for me to fix have been preflop.

I wouldn't say that I have a checklist or anything of the sorts for my preflop hand ranges that I decide to play. Instead there are some things I think about before making a decision to play a hand preflop. Maybe that is a checklist? Dunno. But this sounds more fluid to me (in my head at least) allowing me to be more adaptable (I hope). Here are some things that I have thought about.

Originally I was 3b isolating the CO a lot after they opened or the HJ after the opened (as well as to try to secure position). I found that I was doing so with a wider range after watching some vids which is fine in a vacuum. What I wasn't taking into account was the rate at which the blinds as well as the BTN could cold call my 3bets. I just isolated with a wider range thinking that overall the bet looked stronger (even if people knew what I was doing) and they would fold more of their marginal ranges like low rundowns or ones with top or bottom gaps, etc.

While I do find think that those people are definitely exploitable my failure to adjust often put me playing in larger pots with more marginal hands. So I find that if people have a high tendency to cold call 3bs PF behind me then I will isolate less with my marginal hands and chuck them.

Another thing that I had to think about PF was adjusting to people who have a high 4b PF %. I mean like 30%+. They aren't frequent but when they do they are good sources of money if you play them right. Again I was trying to 3b isolate them with a wider range (as was the rest of the table). What ended up happening was that people just played big 4b+ PF pots with this person either HU or MW and were pretty much gambling against them.

I found that I need to tighten up my range drastically. Hands that I would 3b for isolation I will just flat with and even hands that I would typically 3b for value I will flat with. I would only 3b my strongest hands like AA, KK, broadway rundowns, etc. with the intention of getting it in PF against these players. Otherwise I found that we are just pretty much gambling with the people on the flop as we aren't really pushing preflop equity edges.

1. Have four cards?
2. Have chips left in stack?
3. Raise
4. Have won? Berate opponent
5. Otherwise, continue to raise or bet as appropriate
6. Repeat #4-5 as long as there are still chips left

I find that key to being successful PLO player is to understand what are the best preflop ranges for every position!

Looking through posts here on RIO preflop hand selection is seemingly a very common problem that people have, I have seen a few people say they are still learning the ranges and loads of times where people's advice is to fold preflop so It is something that people generally struggle with and a lot of problems people have I am sure stem from playing the wrong hands pre. I feel that a checklist can systemise thinking so we can use all the information available without having to remember everything in the heat of the moment.

I don't think this works for any kind of poker...there are just too many variables to take into account (players, position, stack sizes, action, momentum, cards, etc). Developing a good 'feel' for the game is required to be good, which comes through study and practice.

I agree 100%. If you put your efforts into something you get the hang of it in time and ultimately the results will come.

1) who/ what happened before you
2) what is your position (relative/absolute)
3) what are the stacksizes.. of the player who has acted/ and players to act!
4) what is the most likely outcome when calling or raising
5) what are my cards actually