There are many easy ways of improving your skills in Grand Theft Auto 5 as long as you know what tricks to use.
You can increase your strength and shooting skills to 100 in only 10 minutes if you utilize a bus trick. First, buy a large amount of pistol ammunition and find a nearby bus. Next, make your character jump on top of the bus and stomp on it while the bus is in movement.
It is imperative to keep moving back and forth or else you will fall off the bus. Eventually, you will hit 100 on your strength stat. To increase your shooting skill stat, shoot down on the middle of the bus until the stat reaches 100. The bus will sustain the bullets without being destroyed.
There is also an easy way to increase your stealth stat to its maximum ability. Every minute spent in Stealth mode increases the stat by one point. An easy way to get it to 100 without doing much work is by putting a rubber band around each analog stick on your controller. This allows the character to keep walking automatically. When you return to the game in 100 minutes, the stealth skill stat should be at 100.
To get a head start when engaging in a race, hold down the LB button for Xbox 360 users or L1 for PS3 users during the countdown to the start of the race. This allows your character to get a head start in the race and subsequently allow for easier victories.
Watch the video below for more tutorials on gaining advantages in Grand Theft Auto 5: