My husband needs a haircut about every 3-4 weeks! It gets bad. It was getting way to expensive for him to get it cut every month. So at the beginning of the year we decided that I would start doing it. I think we had decided it long before that, but I was too scared. It took me a while to figure it out, but I'm pretty good at it now. It's not perfect, but I'm getting there. I've never done a child yet. My son is about 15 months old and he's just getting to the point where he needs a hair cut. I've been waiting until I can go get his pictures taken, but he keeps getting these horrible scratches on his face (Boys!). So sometime at the beginning of the year my husband finally bought clippers. He only paid about $15 for it at Walmart, so it paid for itself in one haircut! It came with complete instructions. I kind of do it differently, but hey, it comes out good anyway. They tell you to start from the bottom and work your way up, but I like doing it from the top and working my way down. Luckily I don't need to use scissors on my husband. He is fine with me using the one inch on top.
Find an easily cleaned location to cut a man's hair. If you're accessible to a patio or sidewalk, consider clipping the hair outside. If not, it's O.K. to clip inside but do so on a hard surface such as tile or wood floors.
Protect the man's clothing by using a barbershop cape around his shoulders. Use a towel if you're not able to use a cape.
Determine the style of cut and length the man wants. Attach the size adjustments to the clippers for different lengths. If he wants a clean cut to the scalp, you're not going to need to use an attachment.
Begin on the side of the hair, and work the clippers straight up and back. Work in sections to achieve different length cuts by changing the attachment after you're finished in one section. If you're not using attachments and cutting one length, work slow and evenly in sections to maintain control over the clippers.
Move to the back of the head and clip the hair straight up.
Trim the base of the neck by using the clippers straight down. Clip to where the shirt collar would come to for an even, clean look.
Remove the cape or towel and brush off excess hair.
***I tried to find a video on YouTube, but there are so many and I couldn't really find one that showed how to do it completely without scissors. But there are many videos, so if you want to do it, you can just search through YouTube and find on that you like.