.tv names are a "special market", in the sense that most folks go after .com domains or ccTLD domains, then other gTLDs and probably .tv last. (I don't own any .tv domains.)
From what I can see there's been a bit of an uptick in the market, probably attributable to YouTube.com convincing people - mostly speculators is my guess - that streaming video is a viable model and .tv offers "special marketing advantages". MY POV is that the "special advantage" is mostly the stuff of marketing hype, since you can stream video from any site. (Reminds me of the "special advantage" of the .mobi domain, which quickly proved to be ephemera/fluff.)
As with all domains it's my opinion that the really desirable ones "sell themselves". You needed do a thing, other than have an accurate email address in the WhoIs record.
So, setting all that unwelcome analysis aside I'd say target 1) any industry focused domain auction (there have been a stready stream); 2) SEDO, Afternic, etc.; 3) put up a lander that makes it clear the domain is for sale; 4) put up a small site on the domain "as a proof of concept" and to begin gaining links; 5) take a look at ElliotsBlog.com (Elliot Silver), who has been spending some time lately talking about his "direct sales" efforts. You risk running afoul of anti-spam laws but you probably can reduce the risk of a complaint by intelligent targeting.
I myself am not a big fan of .TV names given their low selling prices and high renewal fees. You may try listing it on some of the domain marketplaces like Afternic and Sedo as well as contacting potential end users (assuming it doesn't infringe on a company's trademark).
At the end of the day, if you can't sell it to end users then you must evaluate whether it's worth it to continue renewing it.