A tip is only as reliable as your knowledge. If you are given a tip, do you know if it is for a long term investment, a short term gain, for a short, an option?
I would say pick a stock, any stock and follow it. Find out as much as you can and use the discussion on this forum to formulate a knowledgable opinion on it. Track the price and remember that it is earning potential and profitability that drive the price of the company.
Hope this helps.