If you're talking tips for HHN in Orlando? Here's mine...
1-Get there 30 min before opening - they'll say 6:30 open, but it's really 6. So be in line at 5:30 at the latest.
2-When the rope drops, hustle to the first house (Shrek if it's a 6 pm open).
3-Do Shrek and the back of the park first. Everyone will rush to the front. Do the opposite. If you do #1 and #2, you should have 6 of the 10 houses (Shrek + 2 Parades + 2 Tents + MIB) done in the first 2 hours. It should be 8 pm by that point and you only have 4 houses left. If the lines are still relatively short (under 60 min), I'd do another house. By about 8-8:30, the crowds come fast.
4-Once the houses get long lines, this is when I start working the scarezones. It's dark by this point, so they're more active and fun. I may stop and grab some food too. At 29, I made sure to do the Lagoon Show at 9 pm and 10 pm. From around 8:30 to 11:30, I'll do everything other than houses (scarezones, rides, food, shows).
5-Between 11:30 and midnight, crowds will dissipate some. That's when I start attacking the front houses. If there's a really crowded house (like Stranger Things at 29) I'll wait until 10 minutes before close to jump in that line. You buy yourself extra time in the park that way. So if you get through the other houses quickly, you can circle back and redo the ones you really liked.