I won't open any packs until I buy enough packs, dump them all on the floor, and make a "snow angel" out of it.
I recently bought a shining legends fat pack, ahem, bundle, I mean, elite trainer box, and I refuse to open them all up, but instead open one once per 3 days. For any booster pack from any game, I do not like it when I tear the flow wrap. I have to use a small screwdriver to undo the seal at the top of the booster pack.
If I get a main set booster pack, not those special set booster packs, I have to open the packs once every 12 days. I have grouped booster sets into 4 groups depending on when they were released:
Group 1 would be: Sun and Moon, Breakpoint, Primal Clash, XY, Plasma Storm, Next Destinies, Call of Legends, Heartgold Soulsilver, Platinum, Great Encounters.
Group 2 would be: Guardians Rising, Fates Collide, Roaring Skies, Flashfire, Plasma Freeze, Dark Explorers, Black and White, Unleashed, Rising Rivals, Majestic Dawn.
Group 3 would be: Burning Shadows, Steam Siege, Ancient Origins, Furious Fists, Plasma Blast, Dragons Exalted, Emerging Powers, Undaunted, Supreme Victors, Legends Awakened.
Group 4 would be: Evolutions, Breakthrough, Phantom Forces, Legendary Treasures, Boundaries Crossed, Noble Victories, Triumphant, Arceus, Stormfront, Secret Wonders.
The latest set is currently Burning shadows, which is in group 3. The upcoming set, Crimson Invasion, will be in group 4. The set after that will be in group 1, and so on.
My booster opening ritual for main sets are as follows:
I set up my calendar to open pokemon boosters once every 3 days. The other days are reserved for Magic and Yugioh. The cycle goes like this: Pokemon Magic Yugioh Pokemon Magic Magic. I never open more than one pack per day. If the previous day was Yugioh, then the Pokemon packs I open are either from group 2 or group 4, otherwise they are from group 1 or 3. I would open a pack in group 1 only, then 3 days later, open a pack in group 2, and 3 days later, open a pack in group 3, and 3 days later, open a pack in group 4, and the cycle repeats itself. If I do not have any packs from a certain group, I do not open any packs.
Here's a little game for you. Yesterday, I opened a sun and moon pack. How many days from today am I allowed to open an evolutions pack? What booster pack am I allowed to open today? What booster pack am I allowed to open tomorrow?