I do it like George Mander says, but I don't do any wounding, and I cut straight across right below the basal bud. You can search threads by object16 on this forum, whose threads I studied and I agree with him/her about the way to do it. the main thing is, to stick them in soiless mix, to monitor the temp, and to keep the humidity level high, and low levels of light (like fluoresecent for example). George Mander also comes up on a google search.

I have tried the bottle method and had limited success. My main problem was finding area where it got limited sun. I have no shade trees on my property so the cuttings would burn. I bought a Greenhouse last year along with a misting system. I have 80% success rate on my cuttings. I use regular potting soil but the cuttings are misted 3 hours in the afternoon in the GH.
You don't have to buy a GH but a misting setup works best for me. I believe this is what George Mander does but on a smaller scale

Mine have put out leaves this summer, much to my surprise, because it has been very hot. I do cover with a jar, use potting soil, mainly because I can't aford anything more sophisticated, and the potting soil is available very cheap locally, and place the pots in a larger pan so I can water from below. It remains to be seen if they will grow good root systems. The cuttings are on my back porch, which faces north. I imagine the northern exposure is important in my climate.