Ok, at over $100 you should qualify for a host.
So, after you have been playing for a while (say 15-20 minutes) if the floor supervisor has not come to talk to you ("Are you staying with us? Do you have a host?") then you should just mention to the dealer that it's your first time there and you don't have a host. The dealer will alert the floor, who will make a phone call, and in a few minutes a host will show up and give you his/her card, and tell you to call when you check out. They don't know you so they will not offer you anything up-front -- it's all based on your play, which they will evaluate when you leave. So...
1. Whenever you play, give them your players card. Hand it to them along with your cash for your initial buy-in. If you play machines too, insert the card before you play. Make sure that the card reader turns green. If it goes red, remove and re-insert. Note that you are rated based on your average bet and time played, not your buy-in. Some people think that buying in huge helps their rating... it does not. Buying in for $20k and betting $100/hand just looks strange.
2. At craps, tippers generally get rated better than non-tippers. It's a scam, but that's how it works. There is a lot of leeway in how to rate you (because you always have different amounts on the table). If they like you, they will put you at the upper end of the range of possibilities. You don't need to go crazy with it but the occasional bet "for the boys" goes a long way. At your level, the occasional red chip will be appreciated. $6 place bet on the 6 or 8, $1 pass line with full odds, $5 hardway when the point is even, etc, etc. Putting out a tip on your very first bet will often get noticed more!
3. Charge EVERYTHING to your room. Meals, nightclubs, drinks, whatever. Not only at Mirage, but any other MGM properties as well.
4. If you buy anything at a retail store at any MGM property, show them your card for a 15% discount. This includes buying water / snacks / etc at the little stores by the elevators. Note that you will not get retail stuff comped, even if you can charge it to your room.
5. If someone else is staying in your suite (you mentioned it was 2br) and they are playing too, make sure that they get a players card and use it as well.
6. Use the players card for play at any MGM Property, but keep in mind that, although they will comp you for all your play, they will be more generous for play at their property. This is because the host only gets credit for your play at Mirage. If he thinks that you will give him a lot of play, he is more likely to be extra-generous in an attempt to entice you to come back. Hosts have a lot of leeway! I have heard people say that it's better if at least 70% of your play is at the property where you are staying. More is always better.
7. Find out when your host's hours are. If your host will be around when you check out, text/call them a little bit before (or go talk to them in person). If not, talk to them the night before or whatever. Ask them what they can comp off your bill. A $100 rating for 4hours/day is usually enough for a regular room + meals, but you are in a suite. If you were sharing the suite, let him know the players card # of the person you were staying with as well. If the comps don't take care of everything, make sure to ask to use the express comps as well.
8. If you lose a significant amount, expect to be comped much better. They will significantly over-comp losers (they want you to come back). So even if you lose a lot quickly and then quit, don't worry that you didn't put in the hours. They got your money, and they will take care of you. They will comp you based on a percentage of your actual loss, rather than a percentage of your theo.
9. If you lose $10k or more (I have no idea what your budget is) you should ask if you can get something for "airfare". 5% of your loss back in promotional chips is more or less standard (unless you are already way over-comped). You must ask for this -- they will never offer it to you if you don't. If you are going to ask for this, try to take care of everything a bit before you leave so you have time to play them off.
Hope this helps! Have a great time!