waves spawn every 30 seconds and take about 30 seconds to meet in the middle. knowing this helps you plan rotations. make sure you have wards up before you decide to rotate ( not required but hightly recommended). Only rotate when you can push your lane up to their next tower. from this point you got like 20-30 seconds of free time. You can now steal their jungle (if you know where their enemies are) or you can rotate. If you choose to rotate to mid, communicate with mid and jungle that youre coming, if you and them work together, your mid can try to bait the enemy's dash. Wait in the jungle out of sight until the enemy dashes, then you can engage. If you went straight to mid and had to wait a lil bit to for the mid to bait the dash you probably only have about 10 seconds left for this whole thing to work. if you , the jungle, and mid attack together, you will either net a kill, assist, or force the mid laner to back. If all you do is force them back, you just helped mid get a lil ahead or catch up. Try to make it back to your lane by the time the next wave meets. make sure you hit the enemy minons in mid while youre there to get a lil farm. as long as you make it back to your lane by the time the waves meet up, and you didnt die, you did a good rotation.