Smacktard has the right attitude. It's what you make of it. I commute and sat reserve for five months. Here's my two cents to make it work:
1) Get a laptop. It's a big investment if you don't have one, but it's worth its wait in gold. I have a publishing background and I used it to make some extra money while sitting on my a$$. You can also play games, surf the net or watch a DVD while your roomies are watching soaps or whatever.
At XJT, you can also check for open trips that you could request (although there's no guarantee you're going to get it).
I would have gone nuts without my laptop.
2) Get a crashpad with high-speed internet, for the above mentioned reasons.
3) Unless the crashpad offers a van, get a car. I bought one for $500 cash. My crashpad is not convenient to public transportation. There's a hotel 1.5 miles away where you can use their shuttle, but I don't feel like walking that far through heat, rain, cold, snow, etc. Plus, it's Newark (Okay, Elizabeth. A little better). There's a bigger crashpad up the road that has a van service, but the cost of the pad is almost $100 more per month. Instead, I have a car that I can turn around and sell for $500, so I'm coming out ahead. Plus, I can go anywhere I want at my own time. Again, it has made life on reserve much more pleasurable.
4) If you're commuting, pick a base that's commutable. I have 13 flights a day between EWR and where I live. As a result, I was home much more than I or my wife thought I would be. I had considered going to IAH, but the commute to EWR is too good. I know that not everyone has this luxury, but if you have that option, it's something you need to consider seriously.
5) Hope you have an understanding spouse or girl/boyfriend. If they can stand you being on reserve, you two should make it together through this career. I've seen guys in the crashpad who'se significant other was b!tching and moaning because they were gone so much and it really put a lot of stress on the situation. Remember, this is only temporary (unless you're at a company with not movement). Again, something to consider.
Just my thoughts.