DIRECTIONS IN DETAIL

GPS Co-ordinates: Latitude 46.389337 N, Longitude 6.714393 E

Note if you use the Swiss motorways you need a Swiss motorway vignette (sticker for window) 
 40 Sw Fr in 2011, about £30, valid for calendar year. Purchase at border

VIA FRENCH MOTORWAYS

Via French motorways the quickest 
(and often recommended on Sat Navs)

Calais, Rheims, Troyes, Dijon, Bourg-en Bresse, towards Geneva, but go on to Annemasse then to Thonon les Bains, 
up the mountain to Thollon. Can be driven in one day. (about 65 euros in french tolls each way!) 8/10 from Calais

Via Belgium

Via Belgium, motorways are free! Cheap fuel in Luxembourg!(about 1.20€ litre) then through Switzerland (stop at border to purchase swiss tax as mentioned above). follow these directions:- Calais, Dunkirk, Lille, Mons, Namur, Luxembourg, Metz, Nancy Epinal, then cross national park 
via Remiremont to Thann to Mulhouse, Basel, Bern, Fribourg, Montreux, round the lake and up to Thollon-les-memise. : 11+ hours from Calais. Nancy or Metz are worth an overnight stop.

Calais to Rheims 

Calais to Rheims (via toll road 20.80 euro). Then head via toll road towards Chalons-en-champagne (new motervay may not 
be on satnav but well sign posted so keep following signs, costs 3.80 euro in tolls). When you see signs to Saint Dizier follow this (this is were you leave french tolls of the rest of the journey), after Saint Dizier head towards Langres, then to Versoul, from Versoul to Besancon then Pontarlier, then head towards Lausanne (over the Dura mountains) to Switzerland (stop at border to purchase swiss tax as mentioned above), after Lausanne head towards Montreux, round the lake and up to Thollon-les-memise.

This takes about 9/11 hours from Calai. This route is nearly as quick as route 1, however tolls are only paid to just after Rheims an costs around 25 euros each way. Plus about £30 for Swiss motorway tax (paid once lasts for a calender year)
Local directions near Thollon
From Montreux / Switzerland.

Follow the lake, crossing border into France at St Gingolph. If you have a Sat Nav it will tell you to turn left just after Meillerie under a very small railway bridge, this is correct, and saves a few minutes to get to Thollon. Otherwise continue to Lugrin and look for sign to Thollon, again turning left to go up the mountain.
From Geneva 
Follow signs to Evian Les Bain, care in Geneva when you reach the lake, keep the lake in view on your left. There is a badly sign posted left turn near the flume. Continue towards Thonon Les Bains and take the new bypass (not on some maps or some Sat Nav, new in 2008) signposted Evian/Montreux. At the end of the bypass continue towards Evian, but look for signs to Thollon. In Evian if you have missed the turning, again look for signs to Thollon, but if you miss any of the various routes you can still turn off at Lugrin. There are several routes, probably the best is via Publier (signposted first right after the end of the Thonon by pass)
Note! 
Thollon Les Memises is Thollon by the Memises mountain, so you go through various parts of the Thollon commune such as 
Chez –Cachat, the village of Thollon (lovely church, no shops) and Nouy, finally into Thollon Les Memises. Passing on your way the Hotels/Restaurants Bon Sejour and Bellevue and then the Casino supermarket/bakery/paper shop. If heading to Thollon Les Memises you are going to the "station" that is the ski station.