A bizdev friend of mine taught me another: reschedule a call to a Saturday (make up a reason). If it's a serious deal... like, "you're going to be Powerpoint in our office suite"... they'll bitch, but do it.
Sometimes these things are about followup, but a lot of times they're really about qualification; they may just not be into you. It can be important to know that if you're otherwise going to spin your wheels.
Ah, again we see the parallels with dating?
(I did very nearly do this once.)
"I'll be in town after visiting a customer on Friday, can we get together?" is much more likely to have a positive response than "should I fly out to meet with you on Friday?". If the meeting is very important to you (high EV, even if maybe low odds?), it's sometimes worth not making it clear how important.
In other cases, being willing to make what seem like big sacrifices (getting a plane the next hour, changing your flight plans, driving cross-country, etc.) will help your case, if known.
The parallels with dating are very apparent.
That said if you want to make something happen then you make it happen and I didn't. Fail.
I blew a deal like this once, myself. When I was in NYC, a big SV fund wanted to invest in Delicious, but I didn't bother to get on a plane and go visit them after several hits; I just kinda expected them to send me a term sheet without ever meeting me! Pretty stupid. Luckily I later met Fred and company.
PS It's Joshua, not Josh