From the BTS extension discover a new haven far from the stress and pollution.
Crossing the Chaophraya river from Sathorn, you arrive to Krung Thonburi road and Ratchapruek. There were already condos along the river on that side of the river before, however this is with the extension of the BTS line that it started to boom with a lot of new projects rising alone the line and planned extensions. This now become much easier to reach the inner Bangkok than before (not so many bridges available to cross the river) through the expansion of public transportation.
From Krung Thonburi road, right after the river, you can find Charoen Nakhon road hosting many condos near Chaophraya river. Most of them are on the high or luxury range and projects in the area will definitely increase their value as new shopping places open and BTS / MRT join the area. You can actually follow Charoen Nakhon road south until it becomes Rat Burana road right after crossing Rama 3 and its bridge. It then goes west to reach Prapadaeng area. On this road you may also find condos along the river, particularly near the two Big C (Rat Burana and Bangpakok).
Following Krung Thonburi road, along the BTS line and its planned extension, many new condos are launching until for every style but mostly high rise with only a few low rise. This will certainly attract also some new shopping. The condos are mostly in the middle range, with a few cheaper and some more luxurious too. Note that Krung Thonburi road becomes Ratchapruek after crossing Ratchadaphisek (that is also known as Charan Sanitwong a bit further and Rama 3 on the other side of the river) and turns to the north. Only a small section of that road is currently booming with projects at this time (along BTS path).
By road the traffic can be very heavy around the bridge, particularly when commuters go to / come back from the business area. Remaining in the west side of the river will however not cause you trouble and you will normally find all you need there but if you want to go to the center of Bangkok then avoid peak times and you should be all fine once you passed the bridge (or simply use the BTS).
In 2011 the extension from the BTS Silom line finally opened two stations that are Krung Thonburi and Wongwian Yai. They have been very popular since the opening and many commuters decided to use the BTS now rather than their personal cars to cross the Chaophraya. This is actually just the beginning as four more stations are opening end of 2012: Pho Nimit, Ratchada-Ratchaphruek, Wutthakat and Bang Wa. This should provide enough coverage for most residents and greatly help commuting to the center of Bangkok.
In addition to the BTS extension, the MRT is also coming (planned for 2015) with the extension of the current line that will cross the Chaophraya to connect to Bang Wa, going up to Bang Kae, and linking to the current line through Yaowarat and Hua Lamphong. This line will also connect to itself as the Bang Sue station is also extended to cross the Chaophraya, follow Charan Sanitwong and connect to itself at Wang Burapha.
Then the BRT is another way of reaching the other side of the river, using the entrance through Rama 3.
There is Robinson Lardya not far from Wongwian Yai BTS station with the usual shops, restaurants and of course supermarket. Further on the road at the intersection with Ratchadaphisek road is The Mall Tha Phra with even more of everything! There are also two Big C which are the best place to go for gathering large supplies of food, Big C Dao Kanong and Big C Issaraphap.
In Ratburana neighborhood you can find two Big C at Bangpakok and Rat Burana, plus an extra Tesco Lotus for Bangpakok.
Now this is also to consider that a lot of new shopping places are opening with new supermarkets like Villa Market and MaxValu.
Near the river, north from Krung Thonburi road, you can access the Taksin Hospital. A bit further, from Wongwian Yai station you can access the Krungdhon Hospital. From Ratchapruek road, you can also quickly join the Phyathai 3 hospital which provide great services as every hospital from the Phyathai group.
If you are located in Rat Burana area, then simply go to the Rat Burana hospital, next to the Tesco Lotus.
One recommendation if you are looking for a park to visit, try to reach Prapadaeng using Charoen Nakhon / Rat Burana road where nature awaits you. On week-end don't miss the Bang Nam Phueng floating market!
For some dining experience, you can try the Princess Terrace on Charoen Nakhon soi 21, it also contain a bar and karaoke! You can also try the Mei Jiang of the Peninsula hotel, or the thai restaurant from the Mandarin Oriental hotel. Rat Burana also has some great places like the Koh Samed Pub & Restaurant.
The Lounge, further on Krung Thonburi near the intersection with Ratchadaphisek will provide you some great night drinks as of Chill Bar.