How to take a reef safely

a reef can be taken safely on any course and wind. You just have to observe the sequence below

1. sheet in main sail completely.
2. Ease Vang/downhaul. Very important to set reef completely!
3. Ease main halyard to reef mark
4. simultaneously sheet in reefing lines
5. ease halyard until reef is well tight
6. hoist main halyard until luff of mainsail is under tension
7. trim Vang
8. trim mainsail
have a nice sailing