Doesnt work on a big group though Yenners. If your at the back, you will be sprinting all the time after sharp turns and stuff, you need to be in the top 1/3-ish of the group to not be having to keep sprinting.
Holding a line is good.
Oh, and if your wanting to move in a group in a space and someone is blocking you, just gradually move in, keeping an eye on your front wheel and back wheel so it doesnt hit anyone elses wheels.
If your racing, or trying to get away from a group you cant just sit there. It really does annoy me when you get someone in a group that will happily power off, then when you go after them and go to keep the speed up just sit on your back wheel.
I had this on a club ride. Young-ish guy sprinted off up a slight slope near the end of a ride. I let him go then went after him. Past him then kept ahead on the downhill to get the sign and kept the speed going through the village. I was tired, but wanted to keep the speed up to get away from the main group. He sat on my wheel all the way through the village and kept moving my elbow as a sign for him to come on the front. Kept saying for him to come through, then got him to come through and he went to sprint off so i got him back. Finaly got him to take it in turns on the front and he wanted to stop
No chance, so i got him to keep going.
To cut it short i got the last sign and he was ****ed after and had to crawl back to his house
(i sort of had something to prove to this person aswell, he normally sits at the back then right at the end sprints for the last sign, which really annoys me, he sort of thinks of it as a finish line)