The phrase "array of ways to" is correct and usable in written English.
It can be used to describe a variety of methods or approaches to achieve something.
Example: "There is an array of ways to improve your writing skills, including reading extensively and practicing daily."
Alternatives: "variety of methods to" or "range of approaches to".
But the document focuses on an array of ways to improve the various shortcomings that were exposed on Sept. 11.
We will continue to work on a powerful array of ways to defeat this disease because, given the resurgence risk, standing still is simply not an option.
The wristband offers an array of ways to satisfy that need, from the intensely personal to the blatantly public, and that's what made it a champion of the good-will game.
There are a wide array of ways to do this, based on different bits of physics: thermoacoustics, thermionics, thermophotovoltaics, and more, each with pros and cons in terms of their efficiency, cost, and suitability to different conditions.
To complement their academics and research, students choose their own extracurricular adventures, from a spectacular array of ways to participate in music, dance, and sports to dozens of groups that savor and celebrate cultures from around the world.
Mac OS X provides users with a vast array of ways to do things, including going about the tasks of running programs and doing the work that they want to do.
It turns out that there aren't a diverse array of good ways to raise a child, as the progressive academics of the 1970s had suggested.
He has turned commodity parts into a proprietary service, just as nature turns the massive redundancy of just four DNA bases into a dazzling array of unique ways to deal with risk and uncertainty.
There is very little regulation of the role of lead director, and the approaches of different firms and best practices in corporate governance evidence an array of effective ways to empower lead directors.
Receiving royal tweets, posting well-wishing videos on YouTube and downloading phone apps are among an array of technological ways to get involved with the royal wedding.
In circumstances where the stakes are very high — life and death — and we're faced with an array of possible ways to lose, sometimes the best we can do is to choose the option that we most endorse.
