Screening for Naked Put Options with MTR is only the beginning.  Here are some further rules I follow:

1. Limit yourself to solid stocks.  I also limit them to less than 25 dollars.

2. Only sell puts on dips and down days.

3. Only sell puts in a flat to rising market.   In a brief down market, sell naked calls.

4. In a strong rising market, you may initially sell ITM puts; otherwise stay OTM.

5. Go for highest premiums offered; but realize there is a risk factor - Find out what it is before you jump. e.g. pending drug approval, bad news, etc.  

6. Leg in.  Don't sell all your contracts at once.  Average up if the stock goes down for higher premiums.

7. Diversify with ETFs, sectors, etc.

8. Take your loss early - when the premium doubles on you.  Sold for .50, buy it back if the premium gets to 1.00.

9.  Sell short term - one month out, two at the most.

10. Take early profits by buying back if your percentage of profit meets your goals.  Don't let your profits turn into losses again.

The Screener is a great way to find potential candidates but then the real work begins, you need to look at charts, news and fundamentals (eg.Finviz.com).

A big sell-off after an earnings announcement is often an opportunity to get some excellent returns selling OTM Puts but you have to be quick as the premiums can drop quickly once the panic is over, the price stabilises and the bargain hunters move in! .

Here's a few of my recent trades:

2/5/11 AMP Mar 55 Put 95c (2/11/11 20c return 75c in 6 days)

1/27/11 CREE Feb 47.5 Put 65c (2/11/11 2c return 63c in 15 days)

2/1/11 NKE Feb 80 Put 87c (2/11/11 7c return 80c in 9 days)

1/31/11 MAT Feb 23 Put 45c (2/11/11 5c return 40c in12 days)

Good returns with downside protection, the price has already taken a huge hit and is unlikely to drop further.

The decision is whether to close the trade early or hold on to expiry and extract the last few cents.

I like to see stock prices:-

Well below the 200 day SMA

At or below recent lows

Here's some current or recent examples

MRK, MWW, PEP, DLB, JNJ, AKAM

I use Thinkorswim as you can see the earnings release dates on the charts plus view charts of option prices and they have Heikin Ashi charts which are great for observing trends