I agree with Gilmore, try some pictures of your work if you have them. The word energy is a typo, along with the year-'round (don't need the ') on the first one you put up.
I'd also try to convert that paragraph into a bullet list. That's the side of the card most people see first and most people probably wouldn't take the time to read the paragraph, meaning they'll never look at the other side. I like the idea of posing questions to them; maybe use some on the other side and keep the bullet list to reasons they should hire you; i.e. it saves them time, better curb appeal, etc.
Good improvement. I'll tell you how I'd do it; obviously we all have our own ways. I usually use Word then publish it to a PDF to send to the printer; not sure what your circumstance is. Either way, I'll give it a go, don't take it wrong, just throwing out ideas for ya.
I'd change the red font to white on the front to balance it out with the rest of the white on the front and I'd blur the front images so the edges fade into the background image. I'd move the logo up next to the bottom image and have a line on the bottom that reads something along the lines "Call us today for your free estimate at XXX-XXXX" that stretches across the whole bottom. I'd probably drop the caps on everything but the "Enjoy Your Summer!" so they read like sentences, all of the caps are a bit distracting. I'd also play around with the fonts some more; its a matter of personal preference, but I'm more of an Arial guy myself. I also like to use some sort of font that looks hand written (Bradley Hand ITC, in my world; maybe the one in your logo?) to give it a personal touch in certain parts. Again, minor, but I'd try to match the yellow on the front a little closer to the color of the sign in the bottom picture if you can and maybe add a shadow to it. Lastly, I'd just try to get your website on the front.
On the back, the font's a bit tough to read. In Word, I usually use a text box and add a white background then make it 60% or so transparent so you can still see the background image, then use darker text. You can also use black and then keep the white font. Make sure that the full-color image shows 1/4" or so all the way around the text box. Maybe try to break up the bullet list some; the first are three reasons they should use the general service; the remainder is why they should use your service. Totally throwing it off, but consider putting the first three on one side of the card and the remainder on the other. I'd personally ditch the Residential & Commercial, that doesn't matter to too many people, especially if you're mailing it; they'll assume they got it because you'll work for them, residential or commercial. You can probably fill that line with a better selling point. Again, I'd drop the caps on everything and just to get it so you have one line before the URL, try "Check us out online!" or something similar. Again, the font is a personal thing, but I'd use a more plain font and drop the italics on the bullet list and try to keep it to two colors of text. Maybe consider putting the promotions in bubble or something with a bright fill color.
Lastly, if you have any, sneak in a customer testimonial in a hand-written font; goes a long way to reduce risk in the viewer's eyes.
Again, don't take that critical, just throwing out ideas for ya to think about. You should keep fixing it until you think it looks as best as it possibly can, because response rates for direct mailing are low; you need to stand out from the crowd to avoid the path that leads straight to the garbage. It's the difference between closing 1.5% of your cards or 0.25%, which will end up determining if the mailing was worth it or ends up a bad investment. Definitely don't rush it and get opinions from as many people around you as you can. The first time you posted it you said you knew it wasn't the best but you're just looking to test it. Don't let that be your excuse, because personally, I'd like to test my best design versus one that I know I can do better on; you'll just be spending more time and resources on the testing than you really need to.
Nice improvement! The only things I'd say are maybe to move the Enjoy Your Summer so its centered vertically between the two pictures (just has to go down a little bit). For the sake of it; try to italicize it or throw a shadow on it. Also, not a huge deal, but try to keep the sub-title the same width as the Enjoy Your Summer part; maybe try "Let us care for your lawn & landscape" or something of the sort.It looks like you justified the question on the top; maybe just center it; the different spacings between the words on different lines can throw people off a bit; maybe try it and see what it looks like, then decide which is better. Again, I'd do something to fade the edges of the pictures on the front; its called a Soft Edge in Word; under the picture formatting tab. Maybe move your logo up to center it vertically next to the bottom picture; it'll help both your logo and the bottom contact info stand out a bit. The last thing would just be to try to use the same font for all of the white font, the top one looks like it might not be bold or something; I personally like that more. Maybe try to make the bottom contact info font look like the top question one.
On the other side; try:
20% Off First Month of Lawn Care and
10% Off Landscape Maintenance
I'd also put some kind of end date on the offer (i.e. Don't wait! Offer ends 5/31/2012); it'll prompt people to call you back sooner; unless, of course, you're planning on distributing the postcards throughout the year. Consider filling the box with the offer in yellow and using a black font or something of the sort so it really stands out.
On the bottom where you have the Facebook link; that works fine; but to catch more attention, consider inserting an image of the "Like us on Facebook" button and then put the JRServicesMD text next to it.
You're definitely making nice progress; it's a huge improvement from the first one you posted! Keep it up!