1. Generally I don't use circle nor triangle. Except for some very rare and exotic circumstances.
2. The last time I felt the need, I just made one from a piece of some thick thread I had around. Didn't want to draw circles on carpet in my living room. It worked fine.
3. I find it best where there are no people around, so for anything that requires ceremonial approach I have to schedule it for when I'm home alone, or if I can't wait that long, have to wait until everybody else are asleep.
4. Always candle or incense or both, on occasion some other offerings in addition to those two basic.
5. It's difficult without any kind of clairsentience, but there are many other ways they can let you know something. Paying close attention to your dreams and recording them for following few days. Paying attention to your surroundings when you go about your usual day, random people out of blue may say or do something seemingly completely random, almost as if on the impulse, yet relevant to your requests. Etc.
6. To some extent, in some way my practices were "informed" by many of them, Ars Goetia and "similarly themed" newer takes, but now I take from those as little as I can. Through my own experience I learned "kindness" is more important than "right steps" that are provided by some unknown shady source, and those grimoires are not "kind" at all.
7. I noticed no difference in time of day or phase of the moon. Can't say there is none, I just never notice one. I don't follow any timing. I do things whenever I can, day or night. If I find my self alone at home for an hour or two, day or night, that time is as ideal as it gets.
8. Under no circumstance I'd get Abrahimic gods or angels involved. And just in case any of them sneaked in, I'd go and cleanse the space of all that stuff before I even begin evocation.
9. Not sure what you mean by implements. If you mean by all the "materials" used, mostly whatever I have at hand, own made. I don't make candles and incense, but everything else, chants/prayers, sigils etc own made where possible.
10. No drugs or alcohol or anything else that would mess with my head. I haven't noticed any different related to food or sex, I don't think it matters.
11. I don't generally bind anyone. On occasion that may happen though, as part of some specific "work". But that's not part of most of my evocations.
12. Kindness is important, being polite, respectful and so on - absolutely necessary, or at least strongly recommended. Getting Hebrew gods and angels involved - are not necessary, or at least I would strongly not recommend.
13. I have not exactly had bad experience working with anyone from the "list of 72+", but I come in to contact and stayed in contact with only a small handful of them. And I never shot randomly, either I had strong pull before hand, or I was being nagged for a while to connect with someone.
Best experience probably when I asked a little help with something, and I got tenfold - in form of some amazing familiars, who quickly became part of family.
In my evocations I'm not really "I summon thee to do my bidding, for your service you shall slay this virgin chicken.." kind of guy, I'm more of "Hey, I know you're probably busy, but maybe you have minute for chat and a cup of tea?" type of person. I'm not really just kidding, I don't do neither forceful evocations nor demands, I don't really "summon", instead I politely "invite". And I rarely do I ask form anything "material", though I may ask for advice, or some a little help with some issues. Sometimes they can't help, other times they won't, and there are times when they do nothing, for me to later realize it was wrong for me to even ask this or that, and not getting anything was more beneficial.
But I'm not sure I would recommend evocations without clairsentience, which mainly important for being able to memorize, recognize presence of spirit/entity. If you open your window and call for some Peter saying "I got offerings", but some homeless John sleeping on the driveway hears you, he may reply "Oh sure, I'll take it, I can be Peter, or whatever you like me to be." Our messages don't always reach the intended destination even if we are sure we wrote the right name on the envelope.