I need to remember all the countries in a day,can anyone please help?

Ahaha :D
http://www.youtube.com/watch?v=IDtdQ8bTvRc
i think this might help! i just thought it was hilarious, annoying, and dumb but catchy so it might help

Countries of the world in alphabetical order
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This site has information about all the countries in the world. Did you know there are only 191 countries that are not disputed? The list below has more (partially disputed) countries, a total of 257 countries with links to pages with facts about the country, the flag, maps, population, languages, birth rate, information about the land, size, death rate, animals, coordinates, other facts and additional information. Looking for a specific country? Please look in the list below, it is ordered alphabetically in two columns. 1Afghanistan
2Akrotiri
3Albania
4Algeria
5American Samoa
6Andorra
7Angola
8Anguilla
9Antarctica
10Antigua and Barbuda
11Argentina
12Armenia
13Aruba
14Ashmore and Cartier Islands
15Australia
16Austria
17Azerbaijan
18Bahamas, The
19Bahrain
20Bangladesh
21Barbados
22Bassas da India
23Belarus
24Belgium
25Belize
26Benin
27Bermuda
28Bhutan
29Bolivia
30Bosnia and Herzegovina
31Botswana
32Bouvet Island
33Brazil
34British Indian Ocean Territory
35British Virgin Islands
36Brunei
37Bulgaria
38Burkina Faso
39Burma
40Burundi
41Cambodia
42Cameroon
43Canada
44Cape Verde
45Cayman Islands
46Central African Republic
47Chad
48Chile
49China
50Christmas Island
51Clipperton Island
52Cocos (Keeling) Islands
53Colombia
54Comoros
55Congo, Democratic Republic of the
56Congo, Republic of the
57Cook Islands
58Coral Sea Islands
59Costa Rica
60Cote d'Ivoire
61Croatia
62Cuba
63Cyprus
64Czech Republic
65Denmark
66Dhekelia
67Djibouti
68Dominica
69Dominican Republic
70Ecuador
71Egypt
72El Salvador
73Equatorial Guinea
74Eritrea
75Estonia
76Ethiopia
77Europa Island
78Falkland Islands (Islas Malvinas)
79Faroe Islands
80Fiji
81Finland
82France
83French Guiana
84French Polynesia
85French Southern and Antarctic Lands
86Gabon
87Gambia, The
88Gaza Strip
89Georgia
90Germany
91Ghana
92Gibraltar
93Glorioso Islands
94Greece
95Greenland
96Grenada
97Guadeloupe
98Guam
99Guatemala
100Guernsey
101Guinea
102Guinea-Bissau
103Guyana
104Haiti
105Heard Island and McDonald Islands
106Holy See (Vatican City)
107Honduras
108Hong Kong
109Hungary
110Iceland
111India
112Indonesia
113Iran
114Iraq
115Ireland
116Isle of Man
117Israel
118Italy
119Jamaica
120Jan Mayen
121Japan
122Jersey
123Jordan
124Juan de Nova Island
125Kazakhstan
126Kenya
127Kiribati
128Korea, North
129Korea, South
130Kuwait
131Kyrgyzstan
132Laos
133Latvia
134Lebanon 135Lesotho
136Liberia
137Libya
138Liechtenstein
139Lithuania
140Luxembourg
141Macau
142Macedonia
143Madagascar
144Malawi
145Malaysia
146Maldives
147Mali
148Malta
149Marshall Islands
150Martinique
151Mauritania
152Mauritius
153Mayotte
154Mexico
155Micronesia, Federated States of
156Moldova
157Monaco
158Mongolia
159Montserrat
160Morocco
161Mozambique
162Namibia
163Nauru
164Navassa Island
165Nepal
166Netherlands
167Netherlands Antilles
168New Caledonia
169New Zealand
170Nicaragua
171Niger
172Nigeria
173Niue
174Norfolk Island
175Northern Mariana Islands
176Norway
177Oman
178Pakistan
179Palau
180Panama
181Papua New Guinea
182Paracel Islands
183Paraguay
184Peru
185Philippines
186Pitcairn Islands
187Poland
188Portugal
189Puerto Rico
190Qatar
191Reunion
192Romania
193Russia
194Rwanda
195Saint Helena
196Saint Kitts and Nevis
197Saint Lucia
198Saint Pierre and Miquelon
199Saint Vincent and the Grenadines
200Samoa
201San Marino
202Sao Tome and Principe
203Saudi Arabia
204Senegal
205Serbia and Montenegro
206Seychelles
207Sierra Leone
208Singapore
209Slovakia
210Slovenia
211Solomon Islands
212Somalia
213South Africa
214South Georgia and the South Sandwich Islands
215Spain
216Spratly Islands
217Sri Lanka
218Sudan
219Suriname
220Svalbard
221Swaziland
222Sweden
223Switzerland
224Syria
225Taiwan
226Tajikistan
227Tanzania
228Thailand
229Timor-Leste
230Togo
231Tokelau
232Tonga
233Trinidad and Tobago
234Tromelin Island
235Tunisia
236Turkey
237Turkmenistan
238Turks and Caicos Islands
239Tuvalu
240Uganda
241Ukraine
242United Arab Emirates
243United Kingdom
244United States
245Uruguay
246Uzbekistan
247Vanuatu
248Venezuela
249Vietnam
250Virgin Islands
251Wake Island
252Wallis and Futuna
253West Bank
254Western Sahara
255Yemen
256Zambia
257Zimbabwe

It's easy just think of general regions and then if regions doesn't work write whatever's comes to your head. There are about 180 choices that can come up.