When you have set your collection aside
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for a length of time and sort of lost interest, at least active interest, how do you get started up again? I haven't gotten a "new" coin in months.
"If I had a nickel for every nickel I ever had, I'd have all my nickels back".
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However, from previous experiences, I can say that often when you get burned-out, it's good to distance yourself from that subject completely for a period of time. After a while, the things that frustrated you about it will fade and you will want to go back to it. Or perhaps your life takes you in a different direction altogether and coins will always be something that you can return to.
8 Reales Madness Collection
After I finished my Canadian silver dollar collection last year I lost interest in collecting. I think I'm going to read up on the British Commonwealth under George V to see if that sparks interest in that collection again.
I'm still working on an article for Numismatist on double dimes, but I've been priced out of the market and can't afford to add to my 20 cent piece collection right now.
Obscurum per obscurius
I passed the time by cataloging my collection in various ways, re-organizing and assessing what should stay and what could go.
I agree with Roman though, if it's frustration or boredom, distance yourself from it for a while and see if you want to pick back up later. There are also a number of people here, and elsewhere online that can service inexpensive coins for a world type set like you mentioned.
http://bit.ly/bxi7py
Total Copper Nutcase - African, British Ships, Channel Islands!!!
'Do not meddle in the affairs of dragons, for you are crunchy and taste good with ketchup'
It's fun collecting by type + "filling each hole" (with a nice example) in a vintage album can be a challenge...
All of these didn't start at once, but took several years to blossom. I think that the suggestion to try something different is a great way to keep the interest alive. I've used this approach for the 30+ years I've collected, and now find that I have several "dead end" collections - those that kinda started but didn't quite have legs to keep my interest. So.......I've been impressed with Lord M's ancient project and though it'd be fun to try to round out my set with the proceeds from some of this underbrush.
Also, continuing to buy books and reading up on "your" topic is a great way to keep things fresh. The new series of Modesti papal medal books has really ignited my interest in this series again.
I even bought a remaindered James MacKay book "the complete illustrated guide to coins & coin collecting" from Borders the other day for $6. Nothing earthshatteringly new but lots of pretty coin pix and a different presentation help to see my coins in a bit of a new light.
There's always something new it seems.