Bangkok is the capital of Thailand, the country popularly called "Land of Smiles" and there are many things to do, places to see and shopping malls to visit. It depends on what the persons' interest are. Exploring Bangkok by going to the tourists places with a touch of Thai culture and history, from historical to modern, from nature to man-made, as well as enjoying shopping at the side street bargain markets to the Class A shopping malls is not difficult because Bangkok offers all types of transportation such as buses of many types, taxis, trains (traditional, above and underground), tuktuks and motorbikes. Guides and information are easy at hand as one can easily get maps for free at the information booths of shopping centers, train stations and other locations. For more detailed information and personalized inquiry, it is easy to spot a Tourist Information Center.
However, if you come to Thailand for limited number of days, it is best to plan your itinerary and do some researching ahead so as to maximize your time in exploring Bangkok. There are thousands of information that can be sourced out of the internet. You need not pay for a tourist guide. In fact with the technology we have now, one can do the researching and planning of trip conveniently at ease by just sitting in front of a laptop with internet. Hotels have their own websites or are advertised in online booking agencies such as Agoda, Sawasdee, Hotel Travel and a lot more booking sites. It is but wise to check the rates not only at the hotels' own websites as most often booking sites offer a lower price. 
Yes, it is true the easiest and most convenient is to take a taxi but for those budget savers and who totally wants to travel in an adventurous way, it is best to use the public transportation available like the skytrain commonly referred to as BTS and the MRT (subway train) provided there is a station near the place where you are staying or visiting. It indeed unquestionably fast as it avoids the traffic. There are many buses available for which route can be identified by the numbers indicated in the front and back of the bus. Google map shows the bus stops with bus numbers stopping on each. Let us say the buses are for local residents only not for tourists because the time is usually limited and it is a hassle to take the bus. It gives one a great feeling of uncertainty on when to press the button to stop, most specially with the existing of language language barrier, one is lucky if by chance he/she finds someone who can comprehend basic English language.
Whichever mode of transportation one takes, it becomes a part of experience that can be fun with a touch of adventure. However though, as I had mentioned earlier the existence of language barrier, be prepared and anticipate the difficulty of communicating as Thailand is not an English speaking country. Then you need to carry with you the word "patience". But if you know your way, things would be a lot easier.
Enjoy your exploration of Bangkok.
Enjoy your exploration of Bangkok.
