With any species I go online ASAP and get an understanding of the natural habitats and eating habits the T's have such as wheather conditions, humidity habitats whether it be arboreal or terrestrial, obligate burrowers or opportunistic burrowers etc.. From there I set up enclosures appropriately. Make sure you don't have excessive ventilation, and always include water dishes for your T's. Perhaps you knew these things already. But replicating the conditions to a certain extent is what I do. Temperature conditions I keep consistently for all species between 70--80, but humidity i keep controlled per enclosure. I've got a 1" LP, awesome little species! Little for now that is lol.I personally just constantly browse prices on my favourite place, Tarantula Canada, now if only the shipped enclosures haha! I got a nice wad of Christmas cash because my family likes that I have a hobby now! I currently have six specimens, a G. rosea 3.5", 2 P. Cambridgei 1/2", a half inch B. Verdezi, B. Vagans and a half inch LP
When I'm awaiting a T I've already done all of the research before making a decision, so I put my excited energy into preparing enclosures and having everything ready to go.
because i set up enclosures when i decide on what im getting.. and when im waiting/anticipating.. i peek out the front blinds at every little sound i hear as iv already looked into the sp i like and desire long before putting them on my plausible list 
I couldn't agree more with having larger and smaller cage sizes available to prepare for an oversized/undersized T. I once ordered a 1.5" sling only to receive a 3.5" sub adult. Loved the upgrade, but had nothing ready for a T this size.
Hah try expecting a 3-4" T and getting a 1/3.. nothing like having a 5.5 ready and waiting and the 8-32oz cup your looking for.. ends up being a prob 10dram vial... wasnt happy.. i like mine in bigger enclosures so after this insodent i keep 3 sizes on hand for ALL arivals.. 32oz being smallest cup and rest totes ready.. always 5+ shoebox totes with dry sub for no reason xD JUST incase
I would have to agree with this. Precisely why I search on the actual areas and habitats that the specific species are native to and develop enclosures based on that.
So very true i remember back im the day when i got my first lizards printing off every care sheet for my geckos and beardies.. till i realized 3 dif sheets that gave lil extra info then the last, was all saying dif temps and humidities... it used to seem like a science experiment.. now.. i just look up habitats and see how others keep them and put my own twist to it (due to where i live) and test out on empty container before getting an occupant
I have a tendency to read a care sheet and then compare what I find to other sources and recommendations from people who have them. Sometimes I find that the care sheet had at least one piece of valuable information, but just as often I find them hopelessly inaccurate. I like to do some research both here and from other other sources, then bring the information I have come up with here and ask experienced keepers for their opinions on what I have found. I hope that this will show experienced members that I am serious about the topic and not expecting them to do the work for me.
hotogenic:Adding from my above post: As far as care sheets go, I have a whole big folder full of care sheets. What I've found is that terrestrials have quite similar care requirements as do arboreals. I don't look at each specimen any more to see what they need. I prepare the enclosures for each similarly and have plenty of food they'll eat. So, I don't fuss too much over each specimen's requirements like I did when I was brand new at collecting T's. Today, an A. velutina is arriving, about 1", I believe. Size is the only concern and that's already been addressed. I do look up the specimen and try to learn their natural habitat, from where they are found (country), and I'm learning the scientific names for each one. That's a lot of fun!
Pretty much my method. I have a little check list that I generally follow:
