Apple's more recent MacBook Pros and Airs (released in the last couple of years) have a featured called standby that puts your laptop into power-saving mode. While great for battery life, it's not so great for quickly waking up your machine. Fortunately, developer Erv Walter has a super quick command line fix.
Normally, standby goes into effect after a few hours (my MacBook is set to three). Erv changed this to 24 hours by entering the following into the terminal:
sudo pmset -a standbydelay 86400
If you implement this change and want to go back to the defaults, just enter the same command and change 86400 to 10800. Pretty simple!