I'm lucky. I married a woman who can work out anything. She's better than me mechanically but I get my self-esteem back when I have to help her with a computer. Between us we kind of get there. :)
Ironically I'm the one in the house who knows more about getting things to work. I once walked in on three persons, male persons I feel compelled to say but I can't justify it other in terms of social expectations and my own vanity, who had spent 20 odd minutes figuring out how to get a new VCR to work. It took me 6. It's the same with most things. If something works I want to know how. The device detritus must have been faulty in tne first place, no? )
A tuner, 13.95, with tax. I've used many tuners, but this one, I clip to the head of the guitar, and it's right there. I don't have to hold it, plug it, or be in a quiet place as it works off of the guitars vibration. Best buy ever.
Those things are amazing. When I was a kid and learned to play a banjo (fortunately for everybody, long forgotten) I had all the trouble in the world tuning by ear.