Riddle: Some will use me, while others will not, some have remembered, while others have forgot. For profit or gain, I'm used expertly, I can't be picked off the ground or tossed into the sea. Only gained from patience and time, can you unravel my rhyme? What am I?
Answer: I'm Knowledge.
Riddle: You will always find me in the past. I can be created in the present, But the future can never taint me. What am I?
Answer: History.
You will always find me in the past. I can be created in the present, But the future can never taint me. What am I? Riddle Meme.
Riddle: I look at you, you look at me, I raise my right, you raise your left. What am I?
Answer: Your reflection in a mirror.
Riddle: I hurt the most when lost, yet also when not had at all. I'm sometimes the hardest to express, but the easiest to ignore. I can be given to many, or just one. What am I?
Answer: Love.
Riddle: I run through hills; I veer around mountains. I leap over rivers and crawl through the forests. Step out your door to find me. What am I?
Answer: Roads.
I run through hills; I veer around mountains. I leap over rivers and crawl through the forests. Step out your door to find me.
What am I? Riddle Meme.
Riddle: When I point up it's bright, but when I point down it's dark. What am I?
Answer: A Light Switch.
Riddle: You go at red, but stop at green. What am I?
Answer: Watermelon! You eat the red part, and you stop eating at the green part.
Riddle: I always have one eye open. What am I?
Answer: A needle
Riddle: I am a path situated between high natural masses. Remove my first letter and you have a path situated between man-made masses. What am I?
Answer: A Valley. 
Riddle: I am served at a table, In gatherings of two or four; Served small, white and round. You'll love some, And that's part of the fun. What am I?
Answer: Ping Pong Balls.