I am an individual investor. I also assist a small number of other investors develop a quality portfolio by first determining their goals and risks. Individuals I assist with their investments, I mainly help set up a long term investment strategy with a small portion of the portfolio dedicated to trading.
Investing strictly for myself, I am mainly a short term trader with a small amount allocated towards long term holds. The reason my strategy is slighty different than individuals I assist with their investment is that I am willing to take more risk with myself. I try to find short term strategies that use sense, but also require experience, knowledge, and continued research. Information is always changing and that is why adjustments sometimes need to be made to original plans. Although it is easy to fall in love with a stock, just ensure that your continued investment is for the right reasons and the company's strengths are still in tact and their weaknesses have not changed.
The main thing I would push any investor to do is to not be lazy. It is easy to follow the coattails of others and believe a well thought out opinion, but every investor needs to come to their determination of the value of an investment. Ensure that continual research is being done, read the quarterly and yearly statements, contact management often, follow other companies to get a comparison. Also, sharing ideas with other quality investors is a very good and positive thing to do as well as an investor can learn a lot from others, but it is always important to follow up by doing your own due diligence on shared information. Just remember, you do not know everything and there is always something that can be learned.