In a sense, your money has become your employee, and that makes you the boss. You'll want to keep a close watch on how your employee, your money, is doing. Some people like to look at the stock quotations every day to see how their investments have done. That's probably too often. Remember, you're in for the long haul.
Some people prefer to see how they're doing once a year.
That's probably not often enough. What' s best for you will most likely be somewhere in between, based on your goals and your investments. But it's not enough to simply check an investment's performance. You should compare that performance against an index of similar investments over the same period of time. You should also compare the fees and commissions that you're paying to what other investment professionals charge.