If you decide to follow up on the purchase and accept the risk, seriously consider the risk. Have a clear goal, the selection of good companies with high and consistent growth. Stick with an overall plan and strategy. Review the strategy when their is a concern. Invest for the long-term, not minute to minute.
Trading is required on occasion, but try to avoid overtrading.
Follow the company which you are invested in or interested in buying. Following to many is hard and confusing. The disadvantage is the overall return can be affected. Be careful in the event you want to fight the market. When every ones is selling, this could be the best time to buy.