I've developed two small guidelines so far in my short time here.
1. If anyone posts a picture of a rocket and adds something like "To the moon!" it is time to sell.
2. If everyone is shitting their pants at the latest fud and the price is dropping fast it is time to buy, because will be all over in 15 min when the people with the attention span of a puppy have forgotten whatever it was they thought was so important.
99% of the time if someone is giving you advice on here or any investing board, they are doing to make more money themselves. Find the really fabulously obvious ones like icebreaker and do the opposite.