Was planning for this road trip in Jan'2012 but postponed it due to some personal reason will undertake this in coming weeks.
I hope this will help you.
Route for trip:
1) For Delhi-Amritsar-Delhi (469KM and 8.24Hrs):
Delhi-Sonepat-Panipat-Karnal-Ambala-Ludhiana-Jalandhar-Amritsar
2) For Amritsar-Wagah Border-Amritsar (29KM and 37Min):
Amritsar-Azadnagar-Kathania Colony-Rangarh-Wagah Border
Places to see in Amritsar:
1) Golden Temple-Harmandir Sahib
2) Jallian Wala Bagh
3) Ram Tirath-Luv Kush birth place
4) Wagah
5) Atari Junction Rly. Station
Famous food joints in Amritsar:
1) Kanha sweets - Cholle bhature.
Location - Lawrence Road
2) Bansal sweets - Sweet dish (especially Pinni).
3) Bheera chicken - Non-veg tandoori dishes.
Location - Majitha Road
4) Crystal restaurent - Very famous restaurent
Location - Queens Road
5) Kanahiya Sweets - Cholle bhature
Location - Phullan wala chowk
6) Khulche cholle Dhaba - Khulce (Naan) cholle
Location - Maqbool Road
7) Pal dhabha - Keema Naan
Location - Near Durgiyana Mandir
8 ) Parkash Meat - Mutton curry
Location - Near Golden temple
9) Makhan Dhaba - Amritsari fish
Location - Lawrence road
10) Surjeet's - Tandoori chicken
Location : Lawrence road
11) Brijwasi chat - Chaat
Location - Cooper Road
12) Bhravan da dhaba
Location: Near the Golden temple
13) LASSI at Hall Bazaar, Lassi wala chownk, Opposite Regent cinema.
14) Jalebi at Gurdass Ram Jalebi wale
Location - Ahluwali Katra very close to the main gate of Golden Temple.
Hotels in Amritsar:
Rooms are available in 40 hotels across Amritsar after Holi weekend (rooms with parking facility), between room tariffs 777 to 3026, checked MMT online portal .
I suggest you hotel Sapphire located near Golden Temple has view of Golden Temple from hotel rooms, reasonable priced with small parking.
Itinerary:
Day-1: Start from Delhi at 5:00AM to take benefit of early morning low traffic, we can take first break at Murthal, second break at Jalandhar Haveli after 6-7 hours, else can take first break at Karnal Haveli and second in Amritsar.
You can reach Amritsar between 2-3PM. Check in Hotel take rest and can go to temple for evening darshan else roam around local market to complete the shopping part have dinner at any famous joint or in otel itself.
Day-2: Morning temple darshan if not done in evening else roam around in market and complete the part, after dinner can head towards Wagah border
Day-3: Local site seeing for half day and take rest.
Day-4: Early check out to leave for Delhi.
Alternate route
Delhi-Ambala-Shambhu toll-Banur-Kharar-Ropar-Phagwara-Jalandhar-Amritsar.
Road is fine,apart from 15 odd kms around ropar-and expect tolls after every 40Kms