Hang my washing outside (when it's not raining). I especially prefer my sheets hung on the line as they dry nicer and there's something comforting about crawling into a fresh bed with sun dried sheets.
Just the standard reva pegs you can get from Coles etc.
Undies and socks I usually do in the dryer because I'm too lazy to hang them all up.
Trackies by the waistband, but I actually fold the waistband over the line so I'm effectively pegging just under. Same with all pants. Occasionally in winter I will hang them by the ankles as the waistband doesn't completely dry so I'll use gravity and hope the circulating air will make a difference.
I usually peg by the corners. The only thing I don't is my flat sheets as I fold them over 2 strings of the line and peg in kind of the middle. My washing line is too short for my queen sheets so I fold them in half and then hang over 2 lines so the air flow will dry them completely.