There are many launch ramps available around the lake. During low-water years, many of the ramps are not usable except for the smallest boats.
There are several small marinas around the lake, as well as the huge Tahoe Keys marina at South Lake Tahoe. Slips are a precious commodity, however, and generally are not available except for full-season rentals–and even then, waiting lists are often years long.
Fuel is readily available around the lake. Hours vary with the season; call ahead if you are counting on getting fuel in the evening.
The listing below includes public piers on the lake. Most piers have limited space for public tie-up and are subject to considerable swell depending on the weather. Note that there are many more private piers around the lake that should be used only by invitation.
Most piers charge no fee but expect that you are patronizing the business associated with the pier. (One notable exception is the large pier at Gar Woods, which is open to public use for any reason and is useful for accessing other businesses in the area.) Piers at public parks often have time limits and are intended primarily for loading and unloading. Some piers have attendants, especially on summer weekends, who expect to be tipped (much like a valet parking attendant for your car).