As interest rates begin to creep upward as summer draws near, many are scrambling to buy as soon as they can. That's good news for sellers, some of whom may be scurrying to get their houses on the market before interest rates head higher.

The National Association of Realtors reports that April's sales activity was 15.1 percent above the 5.77-million unit pace in April 2003 and was just 0.6 percent shy of the all-time high of 6.68 million posted in September of last year.

David Lereah, NAR's chief economist, had predicted May would finish strong, too.

"Given the favorable economic backdrop and strong sales momentum, a big number was expected for April home sales and it's likely we'll see another big month in May," he said. "Part of what we're seeing now is 'fence-jumping' from people wanting to buy a home before interest rates move higher. Even with an additional rise in recent weeks, the good news is that mortgage interest rates now appear to be leveling-out in the 6.3 percent range."

That fear appears to be playing out in parts of the country, including Texas.

"Last month we saw a huge increase in home sales as many buyers rushed to purchase homes because of fears of rising interest rates," said Wylie, Texas, Realtor Marie Walton.

For sellers, the push for buyers to act quickly may trigger the urgency to put your house on the market -- perhaps sooner than you originally planned.

If you fall into that category, you'll want to make sure your house shows well in order to attract the best offers possible. Some of the things you should do include:

• Make a great first impression. Known as curb appeal, that first look a potential buyer has of your house will have a huge impact. On sunny summer days, you'll want your lawn, shrubs and flowers looking their best. That means keeping your lawn and greenery manicured and planting some annuals for some instant color. Keep the walkway and doorway clear. And make sure your door is clean. Consider a fresh coat of paint.

• Hire a professional to inspect your air conditioner to make sure it's working as it should. Nothing would be worse than your unit going out on a scorching day when would-be buyers are touring the house. And be sure to turn it on when you know potential buyers will be looking.

• Spruce up your back yard. The back yard has evolved into one of the most important rooms of the house, especially in warmer climates. Buyers will be attracted to back areas that have a nice deck or patio area with plenty of space for dining, grilling, and entertaining. And if you have a section of your yard that is child-friendly -- perhaps with a swing set, sandbox or play area -- play it up as much as possible.

• Make your windows sparkle. Make sure your windows are nice and clean, especially if you live in a sunny region that doesn't get much summer rain.

• Keep your walls light. If you're thinking about touching up the paint on your walls before you put your home on the market, keep the colors neutral and light. A light yellow or beige will make the room feel cooler than darker hues, like brick red or dark taupe.

• Let the light in. Open blinds and curtains so plenty of light illuminates the home's interior.

• Keep the pool clean. If you have a pool or spa, make sure it's clean. If you have a fence, make sure locks and latches are working properly.